Exposition. The novel is set in a futuristic world where firemen start fires and all books are banned. A fireman, Montag, meets a woman named Clarisse while walking home one day. She asks him if he is happy
Source: storyboard that
That's cool. why did you write this is there a point you want to get across?
A run on sentence is a sentence that runs on without pause that needs a pause, genes it being called run on. When reading English , the comma shows a pause in the sentence and allows a natural flow. From choices A - C the sentences have flow and include a pause due to the comma. Choice D does not include a comma and when read aloud it sounds rushed and "run on." If it were to be corrected, answer choice D would have a comma placed after the word "flowers".