Lewis and Clark's exploration of the Missouri River was very important for the westward expansion of the United States. For example, the information they gained

Question

A.
prevented the Native American tribes of the Rocky Mountains from harassing American settlers.
B.
allowed the river to become a major transportation route for the Army during the Mexican War.
C.
prevented the British from expanding their settlements from the Pacific Northwest eastward.
D.
allowed the river to become a major transportation route for settlers of the Great Plains.

Answer 1

The correct answer is:

D. allowed the river to become a major transportation route for settlers of the Great Plains.

Lewis and Clark's exploration provided valuable information about the geography, resources, and native peoples of the region, which contributed to the westward expansion and settlement of the Great Plains and beyond.