Midgley Talks About Cultures Such as Britain Being Formed from Mixtures

Midgley talks about cultures such as Britain being formed from mixtures of different influences. What point is she making here?

A) We don't really understand each other's cultures; we just blindly adopt bits and pieces of cultural influence.
B) We are not cultural isolationists, so we probably are not moral isolationists either.
C) If we judged each other moralistically, instead of living harmoniously, cultural mixing couldn't have happened.
D) If we couldn't understand each other's cultures, cultural mixing couldn't have happened.