In order to give supporting details for the claim that there are three New Yorks. The writer has to use more than two or three sentences. So, option A is not enough to give those details and with the last option, there would be wordy paragraphs that are not necessary. The most suitable answer is B, the writer could explain his claim with one or two paragraphs.
People flock him to listen to his jokes and return home laughing. The Monk will make fun of himself. He make sure that there, in the crowd, were not a single gloomy face.