Answer: A. Share insights they have gained in their lives.
Explanation: An autobiography is a self-written account of one's life, usually written by the person himself. It typically includes personal experiences, reflections, and insights about the person's life and the events that shaped it. The main objective of an autobiography is to share the author's personal story, thoughts, and insights about his/her life. It is not primarily written to make arguments about politics, share research on their favorite authors or win a prize for good writing.