What is an advantage of using auto mode versus static mode of power allocation when an access point is connected o a PoE switch port?

What is an advantage of using auto mode versus static mode of power allocation when an access point is connected o a PoE switch port?

A. It detects the device is a powered device B. All four pairs of the cable are used C. Power policing is enabled at the same time D. The default level is used for the access point