Hey!! I believe that the answer is D. Ethnic and religious diversity!!
Answer:
it's a propaganda all of it
The world's population today is much larger than it has been in anytime in the history of the world, and has been continuing to grow ever since the Industrial Revolution, since this raised the living standards and increased in incomes of an enormous number of people, especially in the western world. Advances in medicine have also played a major role.
Greek literature focused mainly on mythology, science, math, and philosophy. Many famous philosophical stories came from the Greeks and Romans. For example plato and Socrates. There was also a lot of important scientific discovery’s in that time! Such as Aristotle who founded zoology!
So most of Greek literature was focused on three things, education, religion, and philosophy.
I hope this is helpful!