单项选择题

有如下程序:  Private Sub Commandl_Click()    Dim a As Single    Dim b As Single    a=2:b=4    Call CS(a,b)  End Sub  Sub CS(x As Single,y As Single)    t=X    x=t\y    y=t Mod y  End Sub  程序运行后,单击命令按钮,a和b的值分别为

A.0 0
B.1 1
C.0 2
D.1 2