The 4th one. Took the test last week and got it wrong because I picked the second one then it said the 4th was correct :)
Regarding the difference between fiction and nonfiction, the statement that is most accurate is that nonfiction writers are more often free to move about in time and space. The correct option among all the options that are given in the question is the third option or option "c". Fiction writers do not need to be realistic.