Which statement best describes priority flow control?

A.
PFC sends a pause frame that indicates which CoS value must be paused.

B.
A flap occurs when both PFC and LFC are enabled, and PFC is disabled before LFC is
configured.

C.
Link-level flow control is very similar to PFC.

D.
PFC asks the peer to stop sending frames of a particular CoS value by sending a pause
frame to a well-known multicast address.