The correct answer is B. King Duncan's guards.
Macbeth and his wife first killed King Duncan's guards, so that nobody could see what they were about to do. Then they moved on to kill the king himself. After his body was discovered (Macduff was the one to see him first), Macbeth admitted to killing the guards because he thought they were the ones who killed Duncan. He explained he was struck with grief and had to kill them because of their alleged murder.
Answer:
He brought with him the dagger that was used to murder Caesar to Caesar's funeral. Marc Antony's funeral oration is marked by his use of reverse psychology as he announces the opposite of his intentions in his speech to the Romans. In this way, he effectively achieves his goal of pointing to the ambitions not of Caesar, but of the conspirators, thus rousing the plebeians to riot and civil war.
Explanation:
He brought to the funeral the dagger that was used to murder Caesar. Mark Antony used reverse psychology calling Brutus an honorable man ironically.