Which of the Following Was an Aim of the Lewis

question 12

Multiple Choice

Which of the following was an aim of the Lewis and Clark expedition?

• A) to discover the source of the Mississippi River
• B) to explore the economic potential of the territory acquired through the Louisiana Purchase
• C) to secure expanses of land for Indian reservations west of the Mississippi River
• D) to bring needed supplies to military forts along America's new western border
• E) to order Spanish traders out of the territory acquired through the Louisiana Purchase

---

Definitions:

Positive Reinforcer

A stimulus that, when presented after a behavior, increases the likelihood of that behavior happening again.

Negative Reinforcer

A stimulus whose removal following a behavior increases the likelihood of that behavior being repeated in the future.

Secondary Reinforcer

A stimulus that gains its reinforcing power through its association with a primary reinforcer; not naturally rewarding.

Negative Reinforcement

A psychological principle where the removal of an adverse stimulus strengthens a behavior.