单项选择题

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.