单项选择题

下列程序段的执行结果为a=1b=0Select Case a Case 1  Select Case b   Case 0    Print"**0**"   Case 1    Print"**1**"  End SelectCase 2     Print"**2**"End Select

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