问题：
[单选题] For better classroom management, what should the teacher do while the students are doing activities?
A、Participating in a group.
B、Preparing for the next procedure.
C、Circulating around the class to monitor, prompt and help.
D、Keeping an eye on the students.
参考答案：
C、Circulating around the class to monitor, prompt and help.
● 参考解析
