Answer: First person protagonist.
As the first person protagonist, the narrator tells the story from a single perspective. In such a mode, the readers get to know the narrator's perspective, view of the characters, experiences and observations.
C is the correct answer, because if a written assignment is a 'humorous report', it means that it can be subjective, and that the author's personality is noticeable in the text. Whereas that is not the case in the other options.