下列数组声明正确的是()。A.n=5 Dim a(1 to n) As IntegerB.Dim a(10) As Integer ReDim a(1 To 1

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 ReDim a(1 to n)As Integer

D．Dim a() As Integer n=5

请帮忙给出正确答案和分析，谢谢！