This story took place a long time ago. But it has been repeated time and time again. Everyone is moved by the true story.   An old man was knocked down by a car and was taken to hospital. He was badly hurt, and during his few returns to consciousness, he repeatedly called for his son.   None knew where his son was. A dirty letter was found in his pockets. The nurse learned that his son was a solider inprefix = st1 /North Carolina.   The hospital called the Red Cross offices to find the young man. The young solider was rushed to the airport in time to catch the plane.   It was evening when the young solider walked into the hospital. A nurse took him into the bedsides of the old man.   "Your son is here," she said to the man. She had to repeat the words several times before the old man's eyes opened. He dimly saw the young man and got great comfort. He reached out his hand. The young solider held the old man's hand and offered words of hope.   All through the night the young solider sat besides the bed. The nurse offered to watch instead of him for a while. He refused.   At dawn the old man died. The nurse started to comfort him but the solider asked her, "Who was that old man?"   "He was your father," she answered.   "No, he wasn't. I never saw him before."   "I knew right away there was a mistake, but I also knew he needed his son, and his son just wasn't here. I realized I was needed. So I stayed." When the old man and the young man met,   _  .
the old man wished the young man good luck in the future the young man said something to comfort the old man the doctors and nurses felt it hopeful to save the old man they both recognized each other at once
Question: This story took place a long time ago. But it has been repeated time and time again. Everyone is moved by the true story.   An old man was knocked down by a car and was taken to hospital. He was badly hurt, and during his few returns to consciousness, he repeatedly called for his son.   None knew where his son was. A dirty letter was found in his pockets. The nurse learned that his son was a solider inprefix = st1 /North Carolina.   The hospital called the Red Cross offices to find the young man. The young solider was rushed to the airport in time to catch the plane.   It was evening when the young solider walked into the hospital. A nurse took him into the bedsides of the old man.   "Your son is here," she said to the man. She had to repeat the words several times before the old man's eyes opened. He dimly saw the young man and got great comfort. He reached out his hand. The young solider held the old man's hand and offered words of hope.   All through the night the young solider sat besides the bed. The nurse offered to watch instead of him for a while. He refused.   At dawn the old man died. The nurse started to comfort him but the solider asked her, "Who was that old man?"   "He was your father," she answered.   "No, he wasn't. I never saw him before."   "I knew right away there was a mistake, but I also knew he needed his son, and his son just wasn't here. I realized I was needed. So I stayed." When the old man and the young man met,   _  .
A. the old man wished the young man good luck in the future
B. the young man said something to comfort the old man
C. the doctors and nurses felt it hopeful to save the old man
D. they both recognized each other at once
Answer: