Why did Spain decide to start setting up missions in Texas after having abandoned Texas for 150 years?

The Spanish Missions in Texas comprise a series of religious outposts established by Spanish Catholic Dominicans, Jesuits, and Franciscans to spread the Catholic doctrine among area Native Americans, but with the added benefit of giving Spain a toehold in the frontier land.

Explanation:

answer; ///i do believe that the correct answer is (d); ///athens had a small population;