Which of the following states borders Mexico?

The correct answer is California because it is one of the four U.S. states that shares a border with Mexico. This border extends approximately 140 miles from the Pacific Ocean to the Colorado River, and it has significant economic and cultural exchanges between the two regions. Cities like San Diego, which is right at the border, exemplify the close ties, including trade and migration.

The other states listed—Oregon, Utah, and Nevada—do not share a border with Mexico. Oregon is located in the Pacific Northwest, far north of California, while Utah and Nevada are situated to the east of California. Thus, they are geographically removed from the U.S.-Mexico border, making them incorrect choices in this context.