What is the most likely reason Odysseus and his crew become trapped behind an enormous boulder in the cave of the Cyclops?

A.
It will make their eventual escape seem all the more impressive.

B.
Caves are the geological structure that people were most familiar with at the time the story was written.

C.
It fulfills the prophecy Odysseus heard in a dream.

D.
Trapping them in a cave is a symbolic punishment for their traveling too far from home.