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单项选择题 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.

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