单项选择题

Questions 7 to 10 are based on the following conversation. At the end of the conversation, you will be given 20 seconds to answer the questions.
Now, listen to the conversation.

What can we infer from this conversation

A.The new record of 400-meter in the NCAA Indoor Track and Field Championships is 44.63 seconds.
B.Kerron Clement broke the world record in the 400-meter when he was 19.
C.The student says he can win Kerron Clement if he is given $ 20.
D.Kerron Clement wants to become American because he doesn’t like his hometown.