Both Brutus and Antony ask rhetorical questions to make points.
In the excerpts both Brutus and Antony ask rhetorical questions. Brutus asks, "Had you rather Caesar were living, and die all slaves, than that Caesar were dead to all free men?...Who is here so base that would be a bondman?" Antony asks, "Did this in Caesar seem ambitious?...Was this ambition?"
The other options are simply incorrect. Brutus does not use ambition to be positive. He says that he slew Caesar because of Caesar's ambition. If he saw ambition as a positive, he probably would not have killed him. They do not described Caesar's weaknesses. Both of them address the crowd directly when they use the pronoun "you".