Which of the following doubled the size of the United States in 1803?
A.
the Civil War
B.
the Louisiana Purchase
C.
the American Revolution
D.
the Mexican-American War
The correct answer is B. the Louisiana Purchase.
To determine the answer, we can analyze each option and eliminate the incorrect ones.
A. the Civil War: The Civil War took place from 1861 to 1865, which is after 1803. Therefore, it did not double the size of the United States in 1803.
B. the Louisiana Purchase: The Louisiana Purchase occurred in 1803 when the United States purchased a vast territory from France, extending from the Mississippi River to the Rocky Mountains. This acquisition effectively doubled the size of the United States.
C. the American Revolution: The American Revolution, which resulted in the United States gaining independence from Great Britain, took place from 1775 to 1783, before 1803. Therefore, it did not double the size of the United States in 1803.
D. the Mexican-American War: The Mexican-American War occurred from 1846 to 1848, after 1803. Therefore, it did not double the size of the United States in 1803.
By process of elimination, we can determine that the correct answer is B. the Louisiana Purchase.