设有如下程序代码:Private Sub Command1_Click() Dim Sname As String, SNo As String, Score As Single Open "D:\Score.txt" __________ As #1 SNo = InputBox("输入学号:") Sname = InputBox("输入姓名:") Score = Val(InputBox("输入成绩:")) Print #1, SNo, Sname, Score Close #1End Sub以上程序的功能是,向文件D:\Score.txt中写入一名同学的学号、姓名和成绩,当文件不存在时,则新建该文件;当文件存在时,则覆盖原文件的内容。在横线处应填入的内容是( )。
A. For Input
B. For Output
C. For OverWrite
D. For Random