Answer:
c. helps readers picture the scene of the searchers in the forest.
d. compares the light of flashlights to the light of fireflies
Step-by-step explanation:
From the sentence, "Flashlights punctuated the darkness like giant fireflies", the simile "like giant fireflies" helps readers picture the scene of the searchers in the forest and compares the light of flashlights to the light of fireflies.