单项选择题
What is the result？（）
A.1，2，3 B.Compilation fails because of an error in line 12. C.Compilation fails because of an error in line 13. D.Compilation fails because of an error in line 14. E.A ClassCastException is thrown at runtime.
单项选择题 What is the result？（）
多项选择题 Which two classes correctly implement both the java.lang.Runnable and the java.lang.Cloneable interfaces？（）
