執行下列Visual Basic 程式片段後，所印出的結果為何？ (A)2 (B)11 (C)19 (D)28 Private Sub Form_Activate( ) Call S1(2) End Sub Sub S1( ByVal X As Integer ) Call S2 ( X , X , X ) Print X End Sub Sub S2(ByVal A As Integer , B As Integer , ByRef C As Integer ) A = A + 1 : B = B + 2 : C = A + B * C End Sub