The correct answer is D. The best example of cultural diffusion is Salsa dancing becoming popular in Miami, Florida, due to a large Latino population.
Explanation:
Cultural diffusion is the extension of the cultural values of a collectivity, denominated transmitter, to another that assimilates the uses and foreign customs called receiver, being the cultural diffusion an essential part of the process of acculturation. In the case, a tradition as it is the dance of salsa is implanted in a culture that is alien to this.
The country of Vietnam is humid and tropical. There was a lot of marsh fighting and also fighting in rice paddies. The country of Vietnam is not dry so the answer is: