Us economic influence in other countries led to diffusion.
a.

political
b.

cultural
c.

traditional
d.

environmental

US economic influence in other countries led to cultural diffusion. Option B is correct.

Cultural diffusion may be defined as the spread of cultural beliefs and social activities from one group of people to another. In this light, since the United States is a country with highest economy rates, countries across the globe view this nation as a highly influential country which is subject of study, in order for other nations to find out what makes the US so powerful.