Hi,
The correct answer in written form is: An autobiography is a story about a certain persons life in their own view (like if I were to write a story about myself.) A biography is written in another persons point of view (if someone were to write a story about myself in their way.
The correct answer in multiple choice of the following is bold.
A. It tells about the writer's life
B. it tells about the life of a real person
C. it tells about a fictional character
D. there is no difference.
This is because of the explanation above.