Answer:
D.
Explanation:
Trust me i don't like this at all, but if you read it anywhere then you need to cite where you read it. Even if you read something just to check your facts and you end up putting it in your paper, you need to cite it. I don't think anyone despises this rule more than me, especially because i am a writer. "I don't want to give them credit, i barely even used them. They were a pawn in the great scheme of this war with this stupid research paper!" That is something i say a lot when faced with this rule.