HELP!! I need this please: *** marks what I answered 1.) Why did the United States have a greater claim to the area around the mouth of the Columbia River then the British did?

a. the United States Navy seized the area
b. the British were not interested in the area
c. Jonathan Thorn's men set up the first U. S. fort there***
d. Wilson Hunt built the Spokane House there

2.) Why did John Astor plan establish a trading post at the mouth of the Columbia River?

a. to support the British government's claim to the region
b. to establish a military base for the War of 1812
c. to trade with people following Lewis and Clark's trail
d. to resettle his family in the West and start a new fur business***

3.) What was the following accomplishment of David Thompson?

a. He arranged for a sea expedition to the mouth of the Columbia River***
b. He built Fort Clatsop on the coast of the Pacific
c. He established the first trading post in Washington
d. He followed the Lewis and Clark trail to the source of the Columbia River

4.) Which of the following ended the War of 1812?
a. Louisiana Purchase
b. maritime sea otter trade
c. Nootka Sound Controversy
d. Treaty of Ghent***