设在工程中有一个标准模块，其中定义了如下记录类型：
TyPe Record
ID A3 Integer
Name As String*20
End TyPe
在窗体中添加一个名为Command1的命令按钮，假设d：\F1.dat文件中含有5个用户自定义类型的记录。要求当执行事件过程Command1_Click时，随机访问该文件，并把文件中的第4条记录读出。下列能够完成该操作的程序段是

A．Private Sub Command1_Click( )
Dim MyRecord As Record，Position
Open"d：\F1.dat"For Random As#1 Len=Len(My Record)
Position=4
Get#1，Position，Myrecord
Close #1
End Sub

B．Private Sub Command1_Click( )
Dim MyRecord As Record，Position
Open"d：\F1.dat"For Random As #1 Len=Len(MyRecord)
Position=4
Put #1，Position，MyRecord
Close#1
End Sub

C．Private Sub Command1_Click( )
Dim MyRecord As Record，Position
Open"d：\F1.dar"For OutPut As #1 Len=Len(My Record)
Position=4
Get #1，Position，MyRecord
Close#1
End Sub

D．Private Sub Command1_Click( )
Dim MyRecord As record，Position
Open"d：\F1.dat"For lnput As #1 Len=Len(MyRecord)
Position=4
Get #1，Position，MyRecord
Close#1
End Sub