B.) a being verb an action verb would be: run, jump, play, kick
I am going to stick with D.
It is very important to support your thesis statement with evidence.
Panic can cause people to act before thinking.
A classic novel can be about any subject.
It doesn't have to be with a villain [Classic love stories]
You dont need a handsome protagonist.
So your answer is:
A doctrine is essential to writing a classic novel.