Mark Antony is repeating that line to discredit Brutus by giving examples to prove that Caesar wasn't ambitious. If Brutus was honorable man he wouldn't have killed Caesar to get what he wanted to accomplish.
Funny, due to the fact of him taking aim at the sun and him making it lose all of it's glow... they are using a funny tone
The answer is⇒ C. shes determined not to try
I believe the answer is B.
Let's look at it with punctuation: My father, an expert in the field of astronomy, recently discovered a comet.
After reading it makes more sense to have the pauses. Hopefully that helps.