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 
} } 
可能会产生下面哪两项结果？（） 

A.before
B.before catch
C.before after done
D.before catch done