Which of the following is true about the monitoring process?以下关于监控过程的说法,哪个是正确的? A. Monitoring is usually carried out by special personnel监控工作通常要由专人来开展 B. We should not only monitor the work of each stage, but also monitor the coordination between each stage不仅要监控各阶段的工作,而且要监控各阶段之间的协调 C. Monitoring only needs to be carried out for the execution process group监控只需要针对执行过程组进行 D. Some small changes may not need to be submitted to the overall change control process for comprehensive review 有些很小的变更可能不需要提交给整体变更控制过程做综合评审