How was Lewis and Clark's exploration of the Missouri River important for westward expansion?
A.
Settlers could more easily travel from St. Louis down to New Orleans.
B. Lewis and Clark ran the first successful steamboat on the Missouri River.
C. The waterway became a major route for people to move west.
D.
It gave settlers a route across the Appalachian Mountains.

C

Explanation:

I would say C because any water way back then was really important because it was faster and more useful. Water ways were faster ways to import and export goods. So, finding a water source was really important for people moving into the west.

d is the correct answer.

b is incorrect because it makes food by itself

c is incorrect because us humans don't know how to produce their own food using the sun like plants.

a is incorrect because consumers can depend on carnivores for eating food for consumers to eat the dead organism. same thing with omnivores.

answer:

d. because dr. laguardia selected a widely used measure, his study generalizes to has strong external validity. external validity has limited external validity. other applications of this measure.

the widely used measure that he applied to his experiment was the benton facial recognition test. it employed on to football players and as result, only players who suffered brain concussions did not pas this test. and although it has an external validity, it is limited because it isn't general to apply to other population.