单项选择题
Questions 1 to 5 are based on an interview. At the end of the interview you will be given 10 seconds to answer each of the following five questions. Now listen to the interview.
What is the purpose of Professor McKay’ s report（） A．To look into the mental health of old people.
B．To explain why people have negative views on old age.
C．To help correct some false beliefs about old age.
D．To identify the various problems of old age.