How does war contribute to cultural diffusion in modern times?

War contributes to cultural diffusion because it makes people have to flee from their homes, and from the home of their culture leading them to other cultures. It can make them dislike the culture that has made them have to leave their causing a headache for everyone. Hostile Religions get mixed up and everything from their is a downward spiral.

Cultural diffusion is the spread of cultural beliefs and social activities from one group of people to another. Through cultural diffusion, horizons are broadened and people become more culturally rich.

I do not see any options so I hope this helps even if it might not be an A/B/C/D answer

d) the constitution rights of native americans and their right to self-government on reservations