Answer:
I and III
Explanation:
In a nonfiction writing piece (like a report or a reference book), it's common to address a problem and its solutions, as well as comparing things to each other. You normally won't see those structures in a fictional writing piece (like a novel).
In a fiction writing, concepts like multiple plotlines and flashback are very common and help keep the reader on the edge, unaware of what's coming. Such 'drama' doesn't have its place inside a nonfiction piece.
