The earthquake that shook Japan on March 11, 2011 was the strongest earthquake in that country's recorded history and the fourth strongest recorded on Earth since 1900. It cracked open the ground, knocked people off their feet, and made tall buildings move. Then things got even worse. It created huge waves called a tsunami  . Walls of water as tall as 30 feet flooded into the coast and swept six miles inland, wiping out everything in the way. Many human survivors were separated from their pets. Many animal lovers went out of their way to help pets in need after the tsunami. And some pets helped their owners, too. When Kamata heard the tsunami alert  , he decided to visit his neighbours to warn them of the coming danger. He put his dog, Shane, in the yard so they could leave as soon as he returned. But later, as he headed home, the tsunami flooded into the city, destroying his path. Kamata was forced to run to higher ground, to a school that served as a shelter. He feared he would never see Shane again. Six hours later, Kamata heard that a dog was waiting outside the school. He went to look: It's Shane! The dog swam through the tsunami and found Kamata, even though Shane had never been to the school. After the huge earthquake ended, 83-year-old Tami Akanuma thought that she and her small dog, Babu, were safe. But Babu was anything but calm. She cried and walked worriedly, as if really wanting to go for a walk. That's strange, since Babu didn't like taking walks. But Akanuma took her out. Outside, Babu headed up a hill instead of toward their normal route near the water. When Akanuma slowed down, the little dog pulled her higher. Once they reached the hilltop, Akanuma looked back and was surprised: The path they had taken was flooded and her home had been destroyed by fast-flowing water. Little Babu helped his owner escape in time. Babu cried and walked worriedy because   _  .
he felt a great flood was coming he was frightened by the tsunami he wanted to go out for a walk he was afraid of being left alone
Question: The earthquake that shook Japan on March 11, 2011 was the strongest earthquake in that country's recorded history and the fourth strongest recorded on Earth since 1900. It cracked open the ground, knocked people off their feet, and made tall buildings move. Then things got even worse. It created huge waves called a tsunami  . Walls of water as tall as 30 feet flooded into the coast and swept six miles inland, wiping out everything in the way. Many human survivors were separated from their pets. Many animal lovers went out of their way to help pets in need after the tsunami. And some pets helped their owners, too. When Kamata heard the tsunami alert  , he decided to visit his neighbours to warn them of the coming danger. He put his dog, Shane, in the yard so they could leave as soon as he returned. But later, as he headed home, the tsunami flooded into the city, destroying his path. Kamata was forced to run to higher ground, to a school that served as a shelter. He feared he would never see Shane again. Six hours later, Kamata heard that a dog was waiting outside the school. He went to look: It's Shane! The dog swam through the tsunami and found Kamata, even though Shane had never been to the school. After the huge earthquake ended, 83-year-old Tami Akanuma thought that she and her small dog, Babu, were safe. But Babu was anything but calm. She cried and walked worriedly, as if really wanting to go for a walk. That's strange, since Babu didn't like taking walks. But Akanuma took her out. Outside, Babu headed up a hill instead of toward their normal route near the water. When Akanuma slowed down, the little dog pulled her higher. Once they reached the hilltop, Akanuma looked back and was surprised: The path they had taken was flooded and her home had been destroyed by fast-flowing water. Little Babu helped his owner escape in time. Babu cried and walked worriedy because   _  .
A. he felt a great flood was coming
B. he was frightened by the tsunami
C. he wanted to go out for a walk
D. he was afraid of being left alone
Answer: