The town has changed a lot _____ what it was before.

A．compared to

B．comparing to

C．compared for

D．comparing with

设有定义：char p[]='1'，'2'，'3'，*q=p；，以下不能计算出一个char型数据所占字节数的表达式是

A) sizeof(p)
B) sizeof(char)
C) sizeof(*q)
D) sizeof(p[0])