The answer is B.
Brutus believes Caesar's death was necessary for the good of Rome. However, the actions of the other men following Caesar's death (actions that are not noble and good, but rather greedy and selfish) lead Brutus to fear that perhaps Caesar's death was not for the good of Rome after all.
I'm leaning to all of them, but yoga is good for any age. It doesn't involve going very fast or running, it's very slow and relaxing.
