Which of the following statement is TRUE about AC functions in the implementation of radio calibration?

Which of the following statement is TRUE about AC functions in the implementation of radio calibration?
A . The AC maintains AP neighbor topology information according to the radio environment information sent by APs.
B . The AC runs the radio calibration algorithm to coordinate and allocate channels and transmit power of APs.
C . The channel adjustment and power adjustment algorithms in radio calibration are coupled with each other, and the AC needs to consider their influence to each other.
D . The AC sends alarms, such as the AP offline alarms to the network management system.

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Answer: C