下列程序段的执行结果为( )。
a=2
b=0
Select Case a
Case 1
Select Case b
Case 0
Print " * * 0 * *"
Case 1
Print" * * 1 * *"
End selec
Case 2
Print " * * 2 * *"
End Select
A． Open"InfoBase．dat"For Output As #2 B． Open"d:\InfoBase．dat"For Output As #2 C． Open"d:\InfoBase．dat"For Input As #2 D． Open"InfoBase．dat"，For Input As #2