A. The US made the Gadsden Purchase.
The US never sold Texas. US won the war. Mexican cession was the US taking land.
Answer:
As he did throughout his life, he believed that every American should have the right to prevent the government from infringing on the liberties of its citizens. Certain liberties, including those of religion, speech, press, assembly, and petition, should be sacred to everyone :)
It was the "c. principle of popular sovereignty" that both the State constitutions and the Articles of Confederation had in common, since both these documents put a strong emphasis on the people being able to choose their representatives.