Final answer:
Texas attracted American settlers with economic opportunities, particularly cheap land and the ability to expand slavery. American settlers, many of whom owned slaves and were Protestants, remained culturally distinct from Catholic Tejanos, leading to political and cultural conflicts.
Step-by-step explanation:
Under Mexican rule, Texas appealed to American settlers primarily because of economic opportunities. These opportunities were evident in the availability of cheap land, which was offered at 10 cents an acre compared to $1.25 an acre in the United States. Furthermore, American settlers in the Mexican province of Texas were typically unlike 'Tejanos' in that many were slave owners and they remained religiously distinct from the Roman Catholic Tejanos, making the correct options a. many were slave owners and b. they remained religiously distinct from the Roman Catholic Tejanos or d. A and B. The conditions favoured the expansion of slavery and the cotton kingdom, with many settlers bringing their enslaved individuals and having a Protestant background, contrary to Mexico's Catholic majority. Cultural and economic tensions eventually contributed to the growing discontent among American settlers, leading to conflicts over slavery, religion, and loyalty to their original homeland.