【单选题】

下列数组声明正确的是（）

A)n=5
Dim a(1 to n) As Integer
B)Dim a(10) As Integer
ReDim a(1 to 12)
C)Dim a() As Single
ReDim a(3 ,4) As Integer
D)Dim a() As Integer
n=5
ReDim a(1 to n) As Integer