C is the best answer I guess
Jake’s proper manner of speaking was an affectation he put on when he was surrounded by the country club set
The answer is the third one. I always look for key words, in this case it is ‘wind’ Wind appears several time in the passage, so it is most likely the main idea.
Or because Greed causes Sir Bedivere to disobey King Arthur’s command to throw the sword in the lake.