The correct element is B - evidence. Statistics and other examples can be used as evidence for a research paper.
I think it's 'ambiguous grief'
I hope this helps! :)
I assume you mean nonfiction writing, if that is the case then here is your answer: Nonfiction writers must write about events that have already occurred. Nonfiction writing is about events that have already happened in the past.
I hope I helped!
Choice B which is direct object