Answer: b.They show a conflict between the conspirators and Mark Antony regarding Caesar's death.
In this passage, we learn about Antony's reaction to Caesar's assassination. He tells us that he considered the conspirators to have been the noblest men that ever lived. However, they are now ruins of who they were before, because they shed such valuable blood. He makes his pain and regret even more obvious by starting his exclamation with the word "woe." Therefore, we learn that there is a conflict between the conspirators and Mark Antony regarding Caesar's death. He does not believe the death was necessary and seems to be sorry it ever took place.