a) contraction of the pupillary constrictor muscles by activation of parasympathetic fibers
b) contraction of the pupillary dilator muscles by activation of sympathetic fibers
c) contraction of the pupillary dilator muscles by activation of parasympathetic fibers
d) contraction of the pupillary constrictor muscles by activation of sympathetic fibers
e) all of the above
b) contraction of the pupillary dilator muscles by activation of sympathetic fibers
c) contraction of the pupillary dilator muscles by activation of parasympathetic fibers
d) contraction of the pupillary constrictor muscles by activation of sympathetic fibers
e) all of the above