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： What is the result？（）
单项选择题 Given: What is the result？（）
单项选择题 Given a correctly compiled class whose source code is： Assume that the class file is located in /foo/com/sun/sjcp/， the current directory is /foo/， and that theclasspath contains "." （current directory）. Which command line correctly runs Commander？（）
