现有：  class Flow {  public static void main（String [] args）   try {  System. out .print （"before"） ；   doRiskyThing （ ）  ；   System.out.print （"after "） ；   } catch （Exception fe） {  System.out.print （"catch"） ；   }  System. out .println （ " done"） ；  }  public static void doRiskyThing（） throws Exception{   // this code returns unless it throws an Exception           }}  可能会产生哪两项结果 ？（）  

• A、 before catch
• B、 before after done
• C、 before catch done
• D、 before after catch