A) "...fought and argued..."
A. It says in the passage that they declined the preposition
D. is wrong. It should be "One hero in the animation field is Mel Blanc, the voice behind many cartoon characters." because the information after Mel Blanc is not necessary to the sentence. It's just extra, so you need a comma.
Answer:
However
Explanation:
However will transition to a different point in a speech. The other options would reference sentence one.
