The Correct answer is Friendship.
Marcus Junius Brutus was a Roman politician who was in charge of killing Julius Caesar. It is a very ironic setting because they were really close friends, but it came to the point where Brutus felt like he had to make a choice between his love for Julius Caesar and his love for Rome. He believed that his friend had become overly ambitious and it was a threat to the Empire, he was obviously in pain but he felt that it was something that was necessary to get done.