How did westward expansion lead to the Kansas-Nebraska Act?

What arguments might a conservation used to justify president roosevelt's expansion of power of federal government

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.

Why is black history month important