Which of the following statements about maintenance is true? _____ 以下关于维护的描述哪个是对的? _____
A、Maintenance is so time consuming, we should assign the job to some beginners.
B、Only the best programmers can be qualified for software maintenance.
C、Since maintenance is a most thankless task, we should have only the unqualified programmers to do the job. We 'd better save the best programmers for development which is more important.
D、Most programmers will be happy and carry on maintenance if they are paid highly enough.