The exposition usually introduces the characters and the setting for the story. Here in The Monkey's Paw, the story begins with Mr. White, an old, British man, and his son playing chess in their home, which is described as the worst of “all the beastly, slushy, out-of-the-way places to live in”.
Social media is a centripetal force and it connects people with the internet’s broad web. It pulls people into groups and depends on each of their likings.
When you are saying the last sentence, replace the word with the answer choices. Therefore, neither is the answer because it is the only one that makes sense grammatically. Also I just took the test and it was correct.