Please help with these questions!(hurry please it's due today!)

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.

How does the u.s. constitutional republic compare to authoritarian forms of government

What is the difference between an independent and a dependent variable?