A Patient with a Severe Allergic Reaction Receives Epinephrine 1:10,000

A patient with a severe allergic reaction receives epinephrine 1:10,000 0.5 ml IV. The next action that the nurse should take is to

A) start oxygen at 100% using a non-rebreather mask.
B) administer diphenhydramine (Benadryl) IV.
C) give a dose of cimetidine (Tagamet) .
D) prepare an infusion of dopamine (Intropin) .