单项选择题
When line 14 is reached， how many objects are eligible for the garbage collector？（）
A.0 B.1 C.2 D.3 E.4 F.6
单项选择题 Which code should be inserted at line 1 of Demo.java to compile and run Demo toprint "pizzapizza"？（）
单项选择题 What is the result？（）
单项选择题 Which code， inserted at line 14， allows the Sprite class to compile？（）
