I believe the answer is A., though it's been a while since I read the story.
What are we answering here there is no question or thing to do?
Diversity strengthens a community because everyone in it can learn something. For an example, each culture is taught and brought up a different way. The things they've learned may be different from the things that you were taught. Diversity can teach you to appreciate other cultures and how deal with new experiences when you go to different places. When a community can be accepting and understanding it actually makes the community better.