In an FCoE environment, for which two sets of data must an interface that implements the PAUSE mechanism always provision sufficient ingress buffer? (Choose two.)
A. frames that were sent with high credit
B. frames that were sent on the link but not yet received
C. frames that were processed and transmitted by the transmitter after the PAUSE frame left the sender
D. frames that were processed and transmitted by the transmitter before the PAUSE frame left the sender
E. frames that were sent on the link and received
