单击命令按钮，并在对话框内依次输入5，7，6下列程序段的执行结果为______。 Private Sub Command1_Click()Dim n AS Integer, a As Integer, b As Integer, c As Integern = 0For i = 1 To 3 a = InputBox ("请输入数字") n = n+a*aIf n ＞ 50 Then GoTo exEnd IfNext iex: Print n End Sub

A．25

B．74

C．85

D．110