Respuesta :
Answer:
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.