Which statement describing a change that took place between 1800 and 1821 to the boundaries of the United States is inaccurate? Florida became a part of the United States. The Louisiana Purchase doubled the country's size. California and Oregon were admitted as new states. New admissions brought the total number of states to twenty-four.

California and Oregon were admitted as new states.

Explanation:

Given that California was admitted into the union in 1850 makes the option a wrong.

Also, Florida indeed became a part of the United States in 1821.

Similarly, the Louisiana Purchase indeed doubled the country's size. This was carried out in 1803.

And at the same time, New admissions indeed brought the total number of states to twenty-four. This was accomplished in 1821.

Hence, in this case, the correct answer is "California and Oregon were admitted as new states."

southerners, for their part, considered brown a terrorist. they felt threatened by northerners' deification of brown and worried about the potential for other, similar armed insurrections.

explanation: