单项选择题

在窗体上放置一个命令按钮Command1,并编写下列单击事件的程序:
Option Base 1
Private Sub Commandl_Click0
Dim C As Integer, d As Integer
d=0
c=6
X = Array(2, 4, 6, 8, 10, 12)
For i= 1 To 6
If X(i) > c Then
d = d + X(i)
c = X(i)
Else
d=d-c
End If
Next i
Print d
End Sub
程序运行后,单击命令按钮,则在窗体上输出的内容为( )。

A.10
B.12
C.16
D.20