How was the Roosevelt Corollary different from the Monroe Doctrine?

How did industrial production improvements impact export-dependent areas of the world during the great depression?   a.  demand for certain raw materials rose.      b.  demand for certain raw materials fell.      c.  the new technology was exported to most raw material producing nations.      d.  there was a decrease in tariffs.

What event brought the us into wwii? what conflicts happened after the us entered the war? i know the first part of this question, i need with the second part.

What is one possible reason a constitutional monarchy developed in england while an absolute monarchy continued in russia