单项选择题

假定有如下Sub过程:
Sub sfun(x As Single, y As Single)
t=x
x=t/y
y=t Mod y
End Sub
在窗体上添加一个命令按钮(名为Command1),然后编写如下事件过程:
Private Sub Command1_Click()
Dim a As single
Dim b As single
a=5
b=4
sfun a,b
MsgBox a & Chr(10)+Chr(13) & b
End Sub
则单击按钮后的输出结果是______。

A.1和1
B.1.25和1
C.1.25和4
D.5和4