单项选择题
Given： What is the result？（）
A.Compilation succeeds. B.Exactly one class does NOT compile. C.Exactly two classes do NOT compile. D.Exactly four classes do NOT compile. E.Exactly three classes do NOT compile.
多项选择题 Given： Which two methods， inserted individually， correctly complete the Three class？（）
单项选择题 Given： What is the result？（）
