Read the excerpt from Act II of Julius Caesar.
Brutus: (To himself) It must be by his death. (He thinks how Caesar might act.) He would be crowned. How that might change his nature, there's the question. Crown him; and then I grant we put a sting in him that he may do danger with. (He shakes his head, worried.) And therefore think him as a serpent's egg, which, hatched, would as his kind grow mischievous, and kill him in the shell.
What makes this excerpt from Act II of Julius Caesar an example of a monologue?
Brutus is revealing his thoughts to the audience.
Brutus is telling Portia about his fears.
Brutus is warning Caesar about the plot.
Brutus is asking Lucius to help him.