The correct answer is B. which is free for all full-time faculty.
Nonrestrictive clauses are often found separated from the rest of the sentence using commas, as is the case here. It means that that clause is not essential for the meaning of the entire sentences, and can thus be deleted without the loss of the meaning.
The answer is C.
it has no commas or punctuation.
A plot is basically what's going on in a story, the main events in a story. In an action movie, there could be a murderer lurking around and the cops step up to stop him.
The plot is a murderer lurking around and the cops work to stop him.
The plot for a perfect day would probably me just being alone. I enjoy my alone time, and it'll allow me to get my own plans done, and not my plans getting ruined because of someone else's plans.