In Frame Relay, the FECN bit is set by:

In Frame Relay, the FECN bit is set by:

A.
The Frame Relay network, to inform the DTE receiving the frame that congestion was
experienced in the path from source to destination

B.
The Frame Relay network, in frames traveling in the opposite direction from those frames that
encountered congestion

C.
The receiving DTE, to inform the Frame Relay network that it is overloaded and that the switch
should throttle back

D.
The sending DTE, to inform the Frame Relay network that it is overloaded and that the switch
should throttle back

E.
Any device that uses an extended DLCI address