Answer:
I believe that the correct answer is the third one: arrogance. The phrase growing feathers represents arrogant tone in the speaker.
Explanation:
When reading that particular line: "These growing feathers plucked from Caesar's wing / Will make him fly an ordinary pitch," we can feel the arrogance in the tone of the speaker. Specially, when reading the word plucked, like the feathers were stolen from Caesar, like he feels proud of it. It represents an arrogant tone in FLAVIUS.
