Modern experts believe this to be true of homer.

a. he was an actor who famously portrayed achilles on stage.
b. he recited epics at celebrations and festivals.
c. he authored many plays that were performed on greek stages.
d. he wrote down great epics for others to read.

The best and most correct answer among the choices provided by your question is the fourth choice or letter D. Modern experts believe that Homer  wrote down great epics for others to read. 

Homer is best known as the author of the Iliad and the Odyssey. He was believed by the ancient Greeks to have been the first and greatest of the epic poets. Author of the first known literature of Europe, he is central to the Western canon.

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