（23）下列程序运行时输出的结果是 Option Base 1 Const a=10 Priate Sub Form_Click() Dim x(a) As Integer k=-1 For i=1 To a x(i)=i*k k=(-1)*k Next i For i=1 To 10 Print x(i) Next i End Sub A.1 3 5 7 9 10 B.-1 -3 -5 -7 -9 C.-1 2-3 4-5 6-7 8-9 10 D.1-2 3-4 5-6 7-8 9-10