The first two seem the most logical.
The answer should be c because the Gods were taken seriously by all Greeks regardless of age. For the answer a consider Hercules, son of Zeus and a human. For b there are many stories that talk about fallen heroes. And for d there were multiple gods, just consider the 9 planet's are named after just some of them.
I think it must be c. Simile comparing the sound of the rain to a drum and beads hitting the roof