The answer is C, they moved 1.8 million tons of supplies over the trail from 1965 till 1975
hope this helps!
EDIT: typo
Individual rights were included in the Constitution because the writers of the Constitution wanted to protect the individual from their government and enshrine certain liberties and rights to make this process well defined. Following colonialism and the intrusion of the British Crown into many aspects of an individuals life the writers of the Constitution sought to prevent this from occurring in the soon to be formed Government of the United States. Enshrining individual rights was an essential goal of the Constitution.
The Louisiana Purchase gave the U.S. control of the Mississippi River and the port city of New Orleans, both of which were used by farmers to ship their crops and get paid