Question

What made the United States a transcontinental power in 1819?
A.) Adams-Onis Treaty
B.) Louisiana Purchase
C.) Monroe Doctrine
D.) War of 1812

Answer 1

The answer is A, the Adams-Onis Treaty

Answer 2

- The U.S. gain of Spanish Florida due to the Adams-Onis Treaty,

Answer 3

oh

Answer 4

thank you :)