Answer:
A. To bring closure and answer questions.
Step-by-step explanation:
This is because typically the purpose of a conclusion in an essay is to bring it to an end or "close" it. In this case, A. is probably your most likely answer as it describes the purpose of a conclusion is to bring "closure" to your essay. Think about it just like an introduction, it begins or starts an essay, same with a conclusion! Most importantly, the conclusion should have touched upon and the topics touched on previously written above in the body of the essay giving it the total ending.
I hope this helps, have a great day! :)