The correct answer is "customs"
Not only does it focus on customs, but also on conversations between the characters and their behavior, as well as their thinking and social status.
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.
The Oxford English Dictionary is best for finding the "Descriptive" meaning. This is the literal meaning, known also as denotative. It can also help you with figurative meanings, but it is not its primary purpose.
