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.
<span>Depending on which passage you are indicating, Ivanhoe is a novel by Sir Walter Scott. It is a historical novel that is published in 1820 with three volumes. It has a subtitle of A Romance. Ivanhoe received a credit that made an increase of interest in the medievalism and romance.</span>
Most Americans believe that the nations political debate has grown toxic. These toxic traits are feared for they might cause violence riots and problems. These debatable problems have gone on for very long and most likely will continue. Most countries and states are built on the fact of political issues and views and it gets more more difficult to understand. But it helps build on ideas and more.
Hope this helps:)