题目内容：
在窗体上有一个名称为Check1的复选框数组(含4个复选框)，还有一个名称为Textl的文本框，初始内容为空。程序运行时，单击任何复选框，则把所有选中的复选框后面的文字罗列在文本框中(见图)。下面能实现此功能的事件过程是?
A．Private Sub Check1_click(Index As Integer)Text1.Text = ""
For k = 0 To 3
If Check1(k).Value = 1 Then
Text1.Text = Text1.Text & Check1(k).Caption & " "?'双引号中是空格
End If
Next k
End Sub
B．Private Sub Check1_Click(Index As Integer)
For k = 0 To 3
If Check1(k).Value = 1 Then
Text1.Text = Text1.Text & Check1(k).Caption & " " '双引号中是空格
End If
Next k
End Sub
C．Private Sub Check1_Click(Index As Integer)
Text1.Text = ""
For k = 0 To 3
If Check1(Index).Value = 1 Then
Text1.Text = Text1.Text & Check1(Index).Caption & " " '双引号中是空格
End If
Next k
End Sub
D．Private Sub Check1_Click(Index As Integer)
Text1.Text = ""
For k = 0 To 3
If Check1(k).Value = 1 Then
Text1.Text = Text1.Text & Check1(k).Caption & " " '双引号中是空格
Exit For
End If
Next k
End Sub?
参考答案：
答案解析：