for each answer choice ask yourself if it is a) descriptively accurate and b) if it is describing the flaw

the best way to write a story is to work backwards; decide on the crime then details like the perpetrator, then the clues

the author uses the term 'should' as a prescriptive method, and thus the answer should have this prescriptive aspect

before looking at the answer choices, it is helpful to visualize what you think the structure of the correct answer should be and then try to match the answer choices to it