What effect does jake's allusion to the greek myth of the
river styx have on the mood of this passage?
it creates a romantic mood of the love for
literature
it changes the mood from gloomy to more
lighthearted.
it turns the mood playful, as myth replaces
grim reality
it makes the mood tense with doom and fear

A. It emphasizes the grim possibility that the characters may face death.

Explanation:

In the passage we also have other hints that this venture into the tunnel could result in their death. Catherine says that no one has ever returned from going in. Also, the narrator uses the words "pitch-black cavity". "its moans sounding like warnings," and "we're souls who've just died." The allusion to the River Styx is just one more reminder that this tunnel could be fatal.

it makes the mood tense with doom and fear.

its c because its his point of view

b. our party quickly made its way into the cave / but we failed to find our host [the cyclops] himself inside.