单项选择题
What is the result？（）
A.Compilation of class A fails. B.Line 28 prints the value 3 to System.out. C.Line 28 prints the value 1 to System.out. D.A runtime error occurs when line 25 executes. E.Compilation fails because of an error on line 28.
单项选择题 Which code， inserted at line 15， creates an instance of the Point class defined in Line？（）
单项选择题 What is the result？（）
单项选择题 Which code， inserted at line 15， allows the class Sprite to compile？（）
