The statement that best explains the meaning added by the allusion in this excerpt is:
Alluding to Pompey invokes the history of his opposition to Caesar, showing that the conspirators in the play are part of a longstanding battle against a tyrant.
This interpretation highlights the historical context of the conflict between Pompey and Caesar, foreshadowing the conspirators' actions against Caesar and framing them within the broader narrative of power struggles in Rome. It emphasizes the theme of tyranny and the consequences of political rivalry, which are central to the play.