单项选择题

阅读下面的程序; Function Func(x As Integer,y As Integer)As Integer Dim n As Integer Do While n < = 4 x=x + y n = n + 1 Loop Func=x End Function Private Sub Command1_Click() Dim x As Integet, y As Integer Dim n As Integer,z As Integer x=1 y=1 For n = 1 To 6 z=Func(x,y) Next n Print z End Sub 程序运行后,单击命令按钮,输出的结果为.

A.16
B.21
C.26
D.31