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.