Answer:
It could affect the way we face certain problems.
There will always be problems with the mixing of community.
The right answer is D, Conflict Theory, This theory is part of the modern sociology and explains when a conflict transcends the individual and reaches a position or social level. Social conflicts are usually due to the scope of power, status or resources that the society they want to neutralize possesses.
I hope my answer can help you.
A. Voluntary trade occurs only when all participating nations expect to gain.