The correct answer is “-Anthony exposes Brutus's folly by showing how Caesar did not seek to be king.”
Indeed, although he uses ironic over repetition of the term “honorable” to describe Brutus and his accomplices, both the context and the excessive repetition indicate that the opposite effect is intended. However, this is more addressed to Brutus’ co-conspirators than to Brutus himself since Brutus did love Caesar since Caesar had been merciful and magnanimous to him. Furthermore, Anthony refers to Brutus, and only to him as “noble”, implying that the company he keeps is not very honorable. And that like “brutish beasts” they have misguided him since he sincerely acted for the good of Rome. And tragically, he has succumbed to such folly since he is “a man that has lost his reason”.