[单项选择题] 下列程序的运行结果是 ______。Private Sub Command1_ Click () a =1: b=1 for i = 1 To 3a= a+ b: b=b+ a

[单项选择题] 下列程序的运行结果是 ______。

Private Sub Command1_ Click ()

a =1: b=1

for i = 1 To 3

a= a+ b: b=b+ a

Next i

Print a, b

End Sub

A．6 6

B．5 8

C．13 21

D．34 55