Context: In 1803, the United States government bought a large piece of land called the Louisiana territory. This deal, known as the Louisiana Purchase, nearly doubled the size of the country.
The territory of the Louisiana Purchase included most of the land west of the Mississippi River and east of the Rocky Mountains. Look at the map. Then answer the question below.
Which letter marks the Louisiana territory?
A. A
B. D
C. C
D. B
Select the correct answer from the provided options and reply with the letter associated with it.

C