In the carrier sence network if the prevailing condition is a “channel busy” then which of following is correct:

(A) If the technique used is non persistant then it results in randomised wait and sence
(B) If the technique used is non 1-persistant then the channel is continuosly senced
(C) If the technique used is non p-persistant then then randomised retransmission is done
(D) Both a and b