I THINK the word that you are searching for is PLOT, which is the main events of a play.
<span>A fact that Erin could be use might be one relating the very beginnings of the sonnet - this would of course be relating more specifically to the Italian Sonnet. The Sonnet originally came from Italy, which is obvious from the fact that the term sonnet comes from the italian sonetto - meaning little poem.</span>
C is the right one. Unlike quotations or paraphrased ideas, information that's considered "common knowledge" doesn't need to be cited. "Common knowledge" is information that's considered widely known or easily verified.
I think the answer is B, visualizing the play. :)
