A Client Is Being Treated for a Serious Laceration of His

A client is being treated for a serious laceration of his forearm.He has received local anesthesia of lidocaine (Xylocaine) with epinephrine.The purpose of the epinephrine in this situation is to:

A) Constrict the blood vessels in the area to dramatically reduce bleeding, thus enhancing the operative field.
B) Constrict the blood vessels in the area to reduce the transmission of pain signals to the central nervous system.
C) Constrict the blood vessels to extend the duration of the drug in the operative area.
D) Constrict the blood vessels to make the wound less distressing to the patient and to promote relaxation.