I believe it is a autobiography because it is told by the person because they know all of the details and events that happened...? I am not 100% sure I am just trying to help.
Based on the given sentence above, the correct answer for this would be the third option. Basing on the point of view of the speaker, we can say that it is in the third person in which he/she means of Akiko. Since Akiko is only one, this is considered as singular. Hope this answer helps.
