Students <u>who purchase parking spots</u> are able to park in the lot closet to the entrance.
The underlined part of the sentence is a restrictive clause.
<em>A restrictive clause is an adjective clause that adds essential information to a sentence.</em>
The very first example of dramatic irony occurs in Act 2, scene 1 when Benvolio and Mercutio are looking for Romeo after the Capulet's party. ... The reason this is dramatic irony is because the audience knows that Romeo is no longer in love with Rosaline; he's in love with Juliet.
(Eliot 75)
When it comes to parenthetical citations, I am going to assume that you are using MLA guidelines. If so, it is only necessary to cite the author's last name, followed by the page number, with no parentheses between them. The last choice is the only one that just gives the last name, so it is correct.
