Why is the south plains region of texas an rich in Tejano culture

A. its border with mexico

b. its rich French history

c. the overwhelming amount of agriculture in the area

d. its connection to the American indian population

The answer to this question is (A) its border with mexico

Due to being located close to each other, many Mexican and Texan people in this region interact with one another.

When they interact, a lot of cultural exchanges happened among these people which make that region of Texas become rich in Tejano culture.