Answer:
a) The Lewis and Clark Expedition
Explanation:
The U.S. claim was based on the explorations of Lewis and Clark and on the establishment of trading posts set up by John Jacob Astor's Pacific Fur Company, such as Astoria at the mouth of the Columbia River. Great Britain based its claim, in part, on James Cook's exploration of the Columbia River.
I think its C, If i remeber
Answer:
Im not 100% sure, but choice 2 looks the best to me
In the later years of the 19th century, the European nations transitioned from "informal imperialism" — i.e., exercising military influence and economic dominance — to direct rule, bringing about colonial imperialism
It is the longest lived one
