Mary Shelley uses a multiple narrative in Frankenstein. A multiple narrative (sometimes referred to as an epistolary narrative) uses the voices of multiple characters within the text. Epistolary narratives can also use letters (such as Walton's four letters at the opening of the novel and the letters between the Frankenstein family) to detail parts of the plot and storyline.
The correct option is C.
From the sentence given above, it can be inferred that Sheralyn did not really like the idea that Dominic has a new sport car and she is probably feeling jealous of Dominic because of his car. When Dominic left the parking lot, Sheralyn was happy that people will no longer notice that Dominic has a new sport car.
So, Sheralyn was uttering the statement given in the question in order to express her strong feelings of jealousy but she said it in such a way that mask her true feelings.
