Which of the following best describes how the boundaries of the United States changed between 1812 and 1821? The U. S. purchased the Florida Territory from Spain and seven states were admitted into the union.

The Louisiana Territory was purchased from France and four states were admitted into the union.

The Northwest Territory was settled and the Louisiana Territory was purchased from France.

Alaska was purchased from Russia and the Florida Territory was purchased from Spain.

A: The U.S. purchased the Florida Territory from Spain and seven states were admitted into the union.

Explanation:

In the year 1819, the Adams–Onís Treaty was signed, giving the US the state of Florida, the treaty went into effect in February of 1821.

answer placeholder because the system is messed up

explanation:

an oligopoly is a term used to clarify the structure of a particular market, industry, or organization. a market is considered oligopolistic or amazingly focused when it is shared between a few companies.