1.Which geographic features especially challenged settlers on the Oregon Trail?

Cliffs and caves.
State borders and plains.
Rivers and mountains.**
Flat grassland.
3.Why were settlers reluctant to settle in the area of Washington before 1846?
It had been reserved for the Pacific Northwest tribes.
It was owned by the Hudson bay company.**
It was part of the French colonies.
It wasn't certain that Washington would be part of the U.S.
4.How could wagons limit the travel of the early settlers?
They were not large enough to carry the necessities.
They could not easily travel across rivers.
They had to be pulled by at least four oxen.
They were not built for long distance travel.**
5.Why did settlers bypass the Whitman's missionary settlement in eastern Washington during the later years of westward expansion?
Settlers were required to pay large fees for passage through the area.
The government set aside this area for the native American tribes.
Native Americans in the area had become hostile.**
The missionaries were hostile to new settler.
I just want them checked pls and thank you.