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.
I think it’s A! Sorry if I’m wrong
Water filters take in water and clean the water. Say some dirt fell in your pool. The water filter would take in the dirty water and clean it and come out with fresh clean water!
