单项选择题
A.p.setWeight（420）；
B.p.changePayload（420）；
C.p = new Payload（420）；
D.Payload.setWeight（420）；
E.p = Payload.setWeight（420）；
单项选择题 Given： When line 15 is reached， how many objects are eligible for the garbage collector？（）
单项选择题 Given： Which statement is true about the objects referenced by snoog， snooch， and booch immediately after line23 executes？（）
多项选择题 Click the Exhibit button. Which three code fragments， added individually at line 29， produce the output 100？（）
