问题：

[单选]

1. public class a { 
2. public void method1（） { 
3. try { 
4. B b=new b（）； 
5. b.method2（）； 
6. // more code here 
7. } catch （TestException te） { 
8. throw new RuntimeException（te）； 
9. } 
10. } 
11. } 
1. public class b { 
2. public void method2（） throws TestException { 
3. // more code here 
4. } 
5. } 
1. public class TestException extends Exception { 
2. }
 Given： 
31. public void method（） { 
32. A a=new a（）； 
33. a.method1（）； 
34. } 
Which is true if a TestException is thrown on line 3 of class b？（）

A .  Line 33 must be called within a try block.
B .  The exception thrown by method1 in class a is not required to be caught.
C .  The method declared on line 31 must be declared to throw a RuntimeException.
D .  On line 5 of class a， the call to method2 of class b does not need to be placed in a try/catch block.