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 Integer
For k = 1 To 5
arr(k) = k
Next k
prog arr()
For k = 1 To 5
Print arr(k);
Next k
End Sub
Sub prog(a() As Integer)
n = UBound(a)
For i = n To 2 step-1
For j = 1 To n-1
if a(j) ＜ a(j+1) Then
t=a(j):a(j)=a(j+1):a(j+1)=t
End If
Next j
Next i
End 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