Important steps in the treatment of barbiturate poisoning include:
a. Maintaining an open airway
b. Increasing the input of afferent stimuli
c. Maintaining respiration
d. Administering a narcotic antagonist
e. Administering a central nervous system stimulant

(a), (b), (c) and (e)

(a) and (b) only

(a) and (c) only

(b) and (e) only

(d) only