( ) 24. 執行下列 Visual Basic 程式片段，輸出結果為何? (A) 7 (B) 6 (C) 5 (D) 4 Sub Main() Console.WriteLine(FNackermann(2, 2)) End Sub Function FNackermann(ByVal m As Integer, ByVal n As Integer) As Integer If m = 0 Then Return n + 1 If n = 0 Then Return FNackermann(m - 1, 1) If (m > 0 And n > 0) Then Return FNackermann(m - 1, FNackermann(m, n - 1)) End If End Function