Answer:
A. they are rapidly disappearing is the correct answer.
Explanation:
Mexico wanted to settle Texas itself, as it was worried about the French presence in the neighboring Louisiana - a settled Texas could work as a "border" between the two". In 1821, when Mexico became independent, it encouraged US-Americans to settle is, as their objective was increased settlement in the area (but not by French).
The U.S. states<span> along the border, from west to east, are </span>California<span>, </span>Arizona<span>, </span>New Mexico<span>, and </span>Texas<span>.
The </span>Mexican states<span> are </span>Baja California<span>, </span>Sonora<span>, </span>Chihuahua<span>, </span>Coahuila<span>, </span>Nuevo León<span>, and </span>Tamaulipas<span>.</span>
