Which was an obstacle to the settlement of the american west?
a) the cumberland gap
b) the northwest territory
c) the great plains
d) the louisiana territory

How did the united states surprise other delegates at the washington naval conference in 1921

Why did european nations face financial challenges after world war 1?

So-called discourage workers are not counted in the unemployment rate counted in the unemployment rate included in the calculation of the labor force considered unemployed