Given the command line java Pass2 and：  public class Pass2 {  public void main（String [] args） {  int x=6；  Pass2 p = new Pass2（）；  p.doStuff（x）；  System.out.print（” main x = “+ x）； }  void doStuff（int x） {  System.out.print（” doStuffx = “+ x++）；  }  }  What is the result？（） 

• A、 Compilation fails.
• B、 An exception is thrown at runtime.
• C、 doStuffx = 6 main x = 6
• D、 doStuffx = 6 main x = 7
• E、 doStuffx = 7 main x = 6
• F、 doStuffx = 7 main x = 7