What was the primary reason behind Spain's abandonment of its colonial claims in Texas?

a. The economic cost of maintaining a colonial stronghold outweighed its benefits.
b. Spanish colonists grew weary of over ten years of bloody fighting with the Mexican people.
c. The indigenous people refused to accept Catholicism as their primary religion.
d. Spain was disappointed in the lack of natural resources and their inability to establish a beneficial trade route within the colony.

Answer: B