As night fell over the valley, a cold rain began, and the disheartened hikers complained bitterly about blisters, wet boots, and a lack of hot food.
Which word or words in the sentence help readers understand that disheartened means "discouraged" and "on the verge of giving up"? (3 points)
a
night fell
b
over the valley
c
complained bitterly
d
wet boots