Which group was the biggest threat to Mexican control of Texas after Mexico gained independence? A. Native Americans
B. United States
C. Spain
D. Great Britain

United States
Because The Texas Revolution (October 2, 1835 – April 21, 1836) was a rebellion of colonists from the United States and Tejanos (Texas Mexicans) in putting up armed resistance to the centralist government of Mexico. While the uprising was part of a larger one that included other provinces opposed to the regime of President Antonio López de Santa Anna, the Mexican government believed the United States had instigated the Texas insurrection with the goal of annexation.

The right answer here is D - the magna carta was designed to assert the rights of nobles, as well as their obligations to those below them. Specifically, a promise from the King to not mistreat his people, in accordance with feudal law. Freedom of speech is not mentioned at any point.