阅读程序：Option Base 1Dim arr（)As IntegerPrivate Sub Form_Click（)Dim i As Integer,j As Int

阅读程序： Option Base 1 Dim arr()As Integer Private Sub Form_Click() Dim i As Integer,j As Integer ReDim arr(3,2) For i=1 To 3 For j=1 To 2 arr(i,j)=i*2+j Next j Next i ReDim Preserve arr(3,4) For j=3 To 4 arr(3,j)=j+9 Next j Print arr(3,2)+arr(3,4) End Sub 程序运行后，单击窗体，输入结果为______。

A． 21

B．13

C．8

D．25