假定有一个菜单项，名为Menultem，为了在运行时使该菜单项失效(变灰)，应使用的语句为

A．Static arrl(3)
arr1(1)=100
arrl(2)="Hello"
arrl(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．ForLoop
B．Const
C．9abc
D．a#x