Which statement best describes the Iliad?

AThe Iliad is the term for the earliest Olympic contests between handicapped people and women.

BThe Iliad is a series of Greek medical books describing all the laws of nature and healing that were known at the time.

CThe Iliad was the famous Greek ship that sailed across the Aegean, Mediterranean, and Ionian Seas to rescue part of the army from Troy.

DThe Iliad is an epic poem that celebrates the Greeks who waged war to win back Helen, and the Trojans who fought to fend off the Greek invaders.