I'm thinking it might be A but lemme research a little before i give you a final answer!
I believe the answer is "C.compare and contrast"
Answer: the theme is basically the moral of the story which means it is the main point of the lesson. An example is “ the theme of the story is .............. which is what authors use to explain their lesson in the story and an argument.
Explanation: i did this in every grade and I know what I’m talking about.