I have a feeling that the answer to your question is letter C.
I hope I have answered it correctly for you.
Answer:
Probables - a simple story used to illustrate a moral.
Epics - a long poem, typically it can refered to be long story.
Explanation:
The study of behavior and why people do the things that they do.
The sentence which is the most subjective is D. My mother had to be the best cook in the world.
It is subjective because that is your own opinion - the other examples are just facts.