Pretty sure its D
Hope this helped! :)
The answer would be the first choice or A. "Original ideas that are <em>not</em> your own."
Any piece of information that does not belong to you would require a citation, otherwise it would be considered <em>plagiarism. </em>B and C are incorrect because both of those things belong to you, and therefore don't require citation. D is also incorrect because a general fact doesn't belong to any one person. For example, if you wanted to include the information that dogs can't eat chocolate, that wouldn't require a citation because that is general knowledge that most people are aware of.
First-person immediately puts the reader inside the narrator's head, which allows for an intimate portrayal of thoughts and emotions. You can effectively communicate how each moment feels—delivering sight, sound, smell, taste, and touch—through the prism of your narrator.