关键字声明的局部变量在整个程序运行中一直存在的是______。

A．Static arr1(3)
arr1(1)=100
arr1(2)="Hello"
arr1(3)=123.45
B．Dim arr2()As Integer
Dim size As Integer
Private Sub Command2_Click()
size=InputBox("输入:")
ReDim arr2(size)
…
End Sub
C．Option Base 1
Private Sub
Command3_Click()
Dim arr3(3)As Integer
…
End Sub
D．Dim n As Integer
Private Sub Command4_Click()
Dim arr4(n)As Integer
…
End Sub

A．Const var1-123
B．Dim var2='ABC'
C．DefInt a-z
D．Static var3 As Integer