The Nurse Explains in Simple Terms to a Client Needing

The nurse explains in simple terms to a client needing a local anesthetic that epinephrine is used with lidocaine (Xylocaine) because

A) the epinephrine and the Xylocaine act synergistically.
B) systemic absorption of epinephrine is maximized by the Xylocaine,and anesthetic effect is reached more quickly.
C) vasoconstriction caused by epinephrine enhances the duration of the effects of the Xylocaine.
D) epinephrine is metabolized more quickly than Xylocaine so that the anesthetic effect is diminished.