单选题 设有一个有10个元素的数组，下列程序将该数组的第1个元素与第10个元素交换，第2个元素与第9个元素交换……，第5个元素与第6个元素交换，在横线处应填写______。
Private Sub Command1_Click()
Dim a(1 To 10)As Integer
Dim i As Integer, Dim p As Integer
Dim t As Integer, Dim j As Integer
For i=1 To 10
a(i)=i
Next i
For j=1 To 5
t=a(j)
______
______
Next j
For i=1 To 10
Print a(i)
Next i
End Sub

• A.a(j)=a(11-j) a(11-j)=t
• B.a(11-j)=a(j) a(j)=t
• C.a(j)=a(11-j) a(j)=t
• D.a(11-j)=t a(j)=a(11-j)