Online grocery shopping was counted as the next great innovation to make our lives easier. In China more than 3,000 websites offer the service, but none have turned a profit. Xiang Nian has had a hard day at the office but at least she can skip the trip to the grocery store. A text message on her phone lets her know the order she placed earlier in the day has been delivered to a locker outside her apartment. "It's really convenient for an office worker like me. My fresh products are waiting for me when I get home and can start cooking. No need to go to the supermarket any more," Xiang says. One of the largest online supermarkets in Wuhan is Just-easy Fresh Produce. Over the past 3 years, the company has developed its online retail grocery business by guaranteeing fresh produce and an innovative delivery system. They've installed thousands of lockers in communitieshttp:// / around downtown Wuhan. "We get an average of 8,000 orders per day. That's the most in China, I'm proud of it. We have placed over 20 thousand lockers in more than half of the communities in Wuhan and we plan to expand to all of them. Many e-commerce giants, like Taobao, are talking about cooperation with us," Jie Xiaofeng, manager of Wuhan Just-easy Agricultural Science & Technology Co., says. While Just-easy may have thousands of customers, a staff of almost 300 and 40 delivery trucks, _ . "There are over 3,000 companies selling fresh products online in China. But none is making a profit. It will take them at least 3 years before they make a profit. The major challenge is the cost of delivery. But they do have many advantages. The price of their goods is lower than the supermarkets," professor He Dehua at Huazhong Agricultural University, says. A number of China's e-commerce giants are making moves into online grocery sales, with Taobao opening an online platform it calls "Cainiao". And traditional retailers  including Wal-Mart and Carrefour are also looking to start selling their produce online. Many big B2C e-commerce players usually take fresh farm produce as the last category to add to their offerings. But now more and more large businesses have set their eyes on the industry. They want to prove the fresh food market is definitely suited to online sales. What is the main idea of the passage?
The online grocery shopping is making our life easier. Just-easy Fresh Produce is a pioneer of the online retail grocery business. Conventional retailers are facing challenges. None of the online grocery supermarkets has made a profit.
Question: Online grocery shopping was counted as the next great innovation to make our lives easier. In China more than 3,000 websites offer the service, but none have turned a profit. Xiang Nian has had a hard day at the office but at least she can skip the trip to the grocery store. A text message on her phone lets her know the order she placed earlier in the day has been delivered to a locker outside her apartment. "It's really convenient for an office worker like me. My fresh products are waiting for me when I get home and can start cooking. No need to go to the supermarket any more," Xiang says. One of the largest online supermarkets in Wuhan is Just-easy Fresh Produce. Over the past 3 years, the company has developed its online retail grocery business by guaranteeing fresh produce and an innovative delivery system. They've installed thousands of lockers in communitieshttp:// / around downtown Wuhan. "We get an average of 8,000 orders per day. That's the most in China, I'm proud of it. We have placed over 20 thousand lockers in more than half of the communities in Wuhan and we plan to expand to all of them. Many e-commerce giants, like Taobao, are talking about cooperation with us," Jie Xiaofeng, manager of Wuhan Just-easy Agricultural Science & Technology Co., says. While Just-easy may have thousands of customers, a staff of almost 300 and 40 delivery trucks, _ . "There are over 3,000 companies selling fresh products online in China. But none is making a profit. It will take them at least 3 years before they make a profit. The major challenge is the cost of delivery. But they do have many advantages. The price of their goods is lower than the supermarkets," professor He Dehua at Huazhong Agricultural University, says. A number of China's e-commerce giants are making moves into online grocery sales, with Taobao opening an online platform it calls "Cainiao". And traditional retailers  including Wal-Mart and Carrefour are also looking to start selling their produce online. Many big B2C e-commerce players usually take fresh farm produce as the last category to add to their offerings. But now more and more large businesses have set their eyes on the industry. They want to prove the fresh food market is definitely suited to online sales. What is the main idea of the passage?
A. The online grocery shopping is making our life easier.
B. Just-easy Fresh Produce is a pioneer of the online retail grocery business.
C. Conventional retailers are facing challenges.
D. None of the online grocery supermarkets has made a profit.
Answer: