有如下VB程序段：

a(1) = 1: a(2) = 2: a(3) = 3: a(4) = 4: a(5) = 5

k = Int(Rnd * 4) + 1: m = k

For i = 1 To m

    If i <> k Then

        If a(i) < a(k) Then

            t = a(i): a(i) = a(k): a(k) = t

            If k < 5 Then k = k + 1

        End If

    End If

Next i

执行该段程序段后，数组元素a(1)~a(5)的值依次不可能为（        ）

A、1 2 3 4 5

B、2 3 1 4 5

C、4 5 3 2 1

D、3 4 1 2 5