Who reigned over Texas during the 100 years it was a province of Mexico?

The correct answer is that Mexican governors reigned over Texas during the period it was a province of Mexico. After Mexico gained independence from Spain in 1821, Texas became part of the new nation, and it was governed by officials appointed by the Mexican government. These governors were responsible for enforcing Mexican law and administration over the territory.

During this time, they dealt with various issues including relations with Native American tribes, land grants, and the growing number of settlers migrating to Texas, many of whom were Americans. The transitional governance from Spanish to Mexican authority marked a significant shift in the political and cultural landscape of Texas, emphasizing the role of Mexican governance in shaping the province's identity and policies during that century.

Other options, such as Spanish viceroys, pertain to the earlier period before Mexico's independence. American governors were not involved in the governance of Texas until after it joined the United States in 1845. Local chiefs, while influential in their communities, did not hold overarching control over the political structure of Texas during this period. Thus, the title of authority legitimately belonged to Mexican governors.