Why did the united states have greater claim to the area around the mouth of columbia river than the british did

1. The united states navy seized the area.
2. The british were not interested in the area.
3. Jonathan Thorns men set up the first U. S. fort there
4. Wilson Hunt built the spokane house there

Why did John Astor plan to establish a trading post at the mouth of Columbia river?

1. To support the british goverments claim to the region
2. to establish a military base for the war of 1812
3. to trade with people following Lewis and Clarks trail
4. to resettle his family in the west and start a new fur business