Which statement is true regarding the Port Aggregation Protocol？ （）

A. Configuration changes made on the port-channel interface apply to all physical ports assigned to the portchannel interface.
B. Configuration changes made on a physical port that is a member of a port-channel interface apply to the port-channel interface.
Configuration changes are not permitted with Port Aggregation Protocol； instead， the standardized Link Aggregation Control Protocol should be used if configuration changes are required.
D. The physical port must first be disassociated from the port-channel interface before any configuration changes can be made.