In the early 1800s, which major North American river were many American settlers using for trade?

Missouri River

Explanation:

The importance of the river for transportation and trade greatly increased in the early 1800s as paddle wheeled steamboats became popular. Cities along the Mississippi such as St. Louis boomed. During the Civil War, both the North and the South used the river for transportation.

answer; exaggerate what you believe is the deception and state it, hoping that the other will jump in to "correct" the statement;