It should not be controversial: it would only make the research less reliable since people would have their opinions about the topic that they would want to defend. It should also not be obscure: then it's hard to check.
The best answer is that it should be multifaceted: it should include a number of aspects, not just one, so that the test can check for those aspects, not just one.
The correct answer is A., a parable is
a simple story used to illustrate a moral or lesson.
Answer:
Land of the Geats
Explanation:
Literally on google but, I still remembered the answer