Answer: A. An autobiography is a type of narrative nonfiction.
Explanation: An autobiography is an account of a person's life written by that person. Fiction is literature in the form of prose, especially novels, that describes imaginary events and people. From the given options, the one that expresses the conclusion that can be drawn from an autobiography is the corresponding to option A, because as an autobiography is based on the writer's life, it is a type of narrative nonfiction.