在Visual Basic工程中，可以作为“启动对象”的程序是

A．Private Sub Text1_KeyPress(KeyAscii As Integer)
If Key Ascii＜65 Or KeyAscii＞90 Then
MsgBox“请输入大写字母”
KeyAscii=0
End If
End Sub
B．Pfivate Sub Text1_KeyDown(KeyCode As Integer,Shift As Integer)
If KeyCode＜65 Or KeyCode＞90 Then
MsgBox“请输入大写字母”
KeyCode=0
End If
End Sub
C．Private Sub Text1_MouseDown(Button As Integer，Shift As Integer，X As Single， Y As Single)
If Asc(Text1.Text)＜65 Or Asc(Text1.Text)＞90 Then
MsgBox“请输入大写字母”
End If
End Sub
D．Private Sub Text1_Change()
If Asc(Text1.Text)＞64 And Asc(Text1.Text)＜91 Then
MsgBox“请输入大写字母”
End If
End Sub

A．If a=3 And b=2 Then
c=3
End If
B．If a=1 Then
c=2
Else If a=2
End If
C．If a=3 And b=2 Then
c=2
Else If a=2 Then
c=3
End If
D．If a=1 Then c=2