<span>It introduces the main focus of the article and creates interest.</span>
What do you mean? are we supposed to have read that book or is that something else?
C) Tying the paragraph together is definitely one of them. If I had to choose another one I would include B) Emphasizing the important points.
Option A, C, and D would be the answers
I think it is Plain Folks. I'm not 100% on this but I do think it's plain folks.