单项选择题
Given： Which code fragment， inserted at the end of line 12， produces the output p is 420？（）
A.p.setWeight（420）； B.p.changePayload（420）； C.p = new Payload（420）； D.Payload.setWeight（420）； E.p = Payload.setWeight（420）；
Given： What is the result？（）A.1B.2C.12D.Compilation fa...
Given： What is the result？（）
A.1 B.2 C.12 D.Compilation fails. E.No output is produced.
Given: What is the result？（）A.The file will compile wi...
Given: What is the result？（）
A.The file will compile without error. B.Compilation fails. Only line 7 contains an error. C.Compilation fails. Only line 12 contains an error. D.Compilation fails. Only line 13 contains an error. E.Compilation fails. Only lines 7 and 12 contain errors.
Given a correctly compiled class whose source code is： ...
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？（）
A.java Commander B.java com.sun.sjcp.Commander C.java com/sun/sjcp/Commander D.java -cp com.sun.sjcp Commander E.java -cp com/sun/sjcp Commander
