Since an autobiography is a novel on a persons life, the logical answer choice would be b)purpose. Point of view doesn't matter because it is not about YOUR life, narration is found mostly in news letter type stories but mostly fictional stories, and the character is mostly developed in a fictional story; an autobiography does not have a character to develop.
Autobiographies are those literary works that are written by a person about himself/ herself. They are written in such a way that it depicts the life of that person, written from his/ her own point of view. This personal account of his/ her own life makes it a point to be taken seriously, without the need to validate if the facts are true or not.
In writing autobiographies, there can be many points to consider. But the most important one is to see what the purpose of the written text is about. There can be any point of view from the author himself/ herself, even the characters can be flawed and the narration changed anytime however he/she wants. But what makes autobiographies legit is the purpose of the book. They should serve as an insight through which the readers can know more about the author. It should also be an important source of inspiration or even a source through which we can know the true character of the author.
