Read this excerpt from the call of the wild by jack london.

by afternoon, perrault, who was in a hurry to be on the trail

with his despatches, returned with two more dogs. "billee"

and "joe" he called them, two brothers, and true huskies

both. sons of the one mother though they were, they were

as different as day and night. billee's one fault was his

excessive good nature, while joe was the very opposite,

sour and introspective, with a perpetual snarl and a

malignant eye.

why does the author include this detail?

a. it is a part of the exposition that describes buck's

teammates.

b. it is a part of the exposition that shares perrault's family

tree.

c. it is a part of the rising action that describes a brutal dog

fight.

d. it is a part of the rising action that shows buck making

friends