Which statement is true regarding the Port Aggregation Protocol？ （）
- AConfiguration changes made on the port-channel interface apply to all physical ports assigned to the portchannel interface.
- BConfiguration changes made on a physical port that is a member of a port-channel interface apply to the port-channel interface.
- CConfiguration changes are not permitted with Port Aggregation Protocol； instead， the standardized Link Aggregation Control Protocol should be used if configuration changes are required.
- DThe physical port must first be disassociated from the port-channel interface before any configuration changes can be made.