单项选择题

当发生窗体的单击事件时,输出的第二行为( )。
Private Sub Form_click()
Dim N1 As Integer,N2 As Integer,N3 As Integer
N1=1:N2=1
Print N1;N2
Do
N3=N1+N2
Print N3;
N1=N2:N2=N3
Loop Until N3>=5
End Sub

A) 1 1
1
B) 2
3
5
C) 2 5
7
D) 2
3
4