Label2的标签，然后编写如下程序代码：Private x As IntegerPrivate Sub Command1_Click()a = 6:

Label2的标签，然后编写如下程序代码：Private x As IntegerPrivate Sub Command1_Click（)a = 6:

Label2的标签，然后编写如下程序代码：

Private x As Integer

Private Sub Command1_Click()

a = 6: b = 4

Call sub1(a, b)

Label1.Caption = a

Label2.Caption = b

End Sub

Private Sub sub1(ByVal x As Integer, ByVal y As Integer)

a = x * x

b = y * y

End Sub

程序运行后单击命令按钮，则两个标签中显示的内容分别是_______。

A.36和4

B.6和4

C.36和8

D.6和8