During what years was the period of Mexican Sovereignty in Texas?

The period of Mexican Sovereignty in Texas took place from 1821 to 1836, which is why the selected answer is correct. This time frame began when Mexico achieved independence from Spain in 1821 and included the six years leading up to the Texas Revolution, which resulted in Texas declaring its independence from Mexico in 1836.

During this period, Mexico established its governance over Texas, encouraged settlement, and enacted laws that affected land ownership and local governance. This era is significant as it laid the groundwork for the cultural and political landscape of Texas, including the settlement patterns and relationships between Native American tribes and Anglo settlers.

The other choices do not represent the complete duration of Mexican rule over Texas. For example, the years 1821 to 1830 omit the critical years leading up to the Texas Revolution, while the period from 1836 to 1845 falls outside Mexican Sovereignty, as it marks the time after Texas had declared independence. The range from 1820 to 1835 inaccurately includes years before Mexico's independence from Spain, which is outside the correct context of sovereignty.