It's not their beliefs, so therefore they think it's wrong and shouldn't exist.
For example, crime. As you're growing up, crime is meant to be bad and you shouldn't do it. This is the same for cultures. You grow up with that culture and are taught that's how things should be. So when you see another culture you think it's bad and that it shouldn't exist.
I hope I could help!
I think the topic sentence is sentence 10.
Both A and C are correct.
Methinks already from this chemic flame, I see a city of more precious mould: Rich as the town which gives the Indies name, With silver paved, and all divine with gold.
