单选题：Supposing `int a[3]; ` Which one is invalid to specify an item

Supposing `int a[3]; ` Which one is invalid to specify an item of array a?
@[D](2)

A. a[0]
B. a[1*2]
C. a[4-2]
D. a[3]




A.a[0]
B.a[1*2]
C.a[4-2]
D.a[3]


答案：D