在E盘当前目录文件夹下建立一个名为“Student.txt”的随机文件，要求用InputBox函数输入5个学生的姓名(StuName)、年级(StuGrade)和年龄(StuAge)。在程序中有以下记录类型和窗体的事件过程，请选择正确的语句完成程序( )。
Private Type student
StuName As String * 10
StuGrade As String * 10
StuAge As Integer
End Type
Private Sub Form_Click()
Dim s As student
Open "c:\student.txt" For Random As #1 Len = Len(s)
For i = 1 To 1
s. StuName = InputBox("请输入姓名")
s. StuGrade = InputBox("请输入年级号")
s. StuAge = Val(InputBox("请输入年龄"))
Next i
Close #1
End Sub
A．Print #1,s
B．Print #1,i
C．Put #1,,s
D．Put #1,,i
