Why did Lewis and Clark travel across the continent

Explanation:

The Lewis and Clark Expedition from August 31, 1803, to September 25, 1806, also known as the Corps of Discovery Expedition, was the United States expedition to cross the newly acquired western portion of the country after the Louisiana Purchase.

To explore the Louisiana Purchase and the Pacific Northwest.

i think the answer is b.

no every country is held to the same degree as others just some member countries such as the usa and germany are more economically sound so the need to show there support to all others