The word "discrepancy" (Para. 3) most probably means ______.

A．It requires formal training.
B．It is often enjoyed by those with strong analytical ability.
C．It is disliked by blacks.
D．It is more difficult to learn than classical music.

A．Mathematical ability and musical ability are connected.
B．Mathematical ability has more to do with the brain than musical ability.
C．More people are good at music than math.
D．More research should be done into the relationship between mathematical ability and musical ability.