Answer:
D. Mexican foods and celebrations are popular throughout the area
Step-by-step explanation:
The southwestern part of the United States has been part of Mexico until relatively recently. This meant that the region was under the influence of the Spanish culture. Even though the United States managed to conquer this part from Mexico, the majority of the population remained, so it was predominantly Mexican population living in the area, and even with the mass migrations later on, it still remained in high percentage. The different cultural landscape is easily noticeable, as it is much more similar to that of Latin America, than the United States, so it is a nice clue about the past of the area.