Wghich one of the following agents may be added to local injection of Xylocaine in order to prolong its effect.. Epinephrine

Wghich one of the following agents may be added to local injection of Xylocaine in order to prolong its effect:
A) Succinylcholine chloride
B) Sodium carbxymethylcellulose
C) Polyethylene glycol
D) Epinephrine***