下列事件过程的功能是：建立一个名为Datal的随机文件，存放角度值及这些角度的正弦函数值和余弦函数值，角度为1，2，3，…，90。请选择正确的程序段是( )，将程序补充完整。 Private Type Ang K As Integer Sinx As Single Cosx As Single End Type Dim Ksc As Ang Private Sub Form_Click() Dim Y As Single Dim i As Integer Dim Ksc As Ang Open ______ Y=14159/180 For i=1 To 90 KsC.K=i KsC.Sinx=Sin(i*Y) KsC.Cosx=Cos(i*Y) Next i Close #2 End Sub A.../Datal.txtFor Random As #1 Len=10 Put #1，i，Ksc B.../Datal.txtFor Random As #1 Len=10 Put #1，Y，Ksc C.../Datal.txtFor Random As #1 Put #1，i，Ksc D.../Datal.txtFor Random As #1 Put #1，Y，Ksc