What was the difference between German & American response to the great depression

Which fact would this be, and how might you verify the truth?

What role did mazzini play in italian unification? a.) he dreamed of a united italy and took the first steps to achieving it. b.) he conquered the southern part of italy, including sicily. c.) he was the first leader of a united italy. d.) he was assassinated by the french government, making him a martyr.

In an industry in which there are several providers of a type of good, why can one business not charge much higher prices for their goods?