America in the 1870’s -1880’s, people were living on what two types of homes?

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.

Which country was the last to join the allied powers? o great britain o france o united states o china

What new concept did the the american revolution introduce into the world