Question

The spread of the Spanish language across southwestern portions of the United States is an example of

a. cultural diffusion.
b. culture region.
c. linguistics.
d. economic activity.

Answer 1

the answer is choice A.

Answer 2

It is not an economic activity - it's linguistic in nature, not economic.

It is not linguistics either - linguistics is a scientific discipline.

It's also not a culture region - this would be a kind of region, and a region is not the same as spread of culture.
The correct answer is "a) cultural diffusion.