[单项选择题] 窗体上有一个名为Command1的命令按钮，并有下面的程序：Private Sub Command1_Click()Dim arr(5) As IntegerFor k = 1 To

[单项选择题] 窗体上有一个名为Command1的命令按钮，并有下面的程序：Private Sub Command1_Click()Dim arr(5) As IntegerFor k = 1 To 5arr(k) = kNext kprog arr()For k = 1 To 5Print arr(k);Next kEnd SubSub prog(a() As Integer)n = UBound(a)For i = n To 2 step-1For j = 1 To n-1if a(j) ＜ a(j+1) Thent=a(j):a(j)=a(j+1):a(j+1)=tEnd IfNext jNext iEnd Sub程序运行时，单击命令按钮后显示的是（）。

A .1 2 3 4 5

B .5 4 3 2 1

C .0 1 2 3 4

D .4 3 2 1 0