The proper use of a conclusion is to restate the main argument or claim so I would go with A). To reinforce the primary claim.
The correct answer is D. Cannot stand as a sentence.
Subordinate clauses convey no meaning when left alone and must always be used in combination with independent clauses so as to create a complex sentence that conveys meaning.
I can infer that he is making fun or Donald trump or he is Donald. Either way he is not getting voted in 2020
