The German migration to the United States a. was sometimes temporary, as a significant percentage of Germans returned to their native land.
b. provoked race riots in several cities.
c. was in most respects similar to that of the Irish.
d. included few educated professionals or skilled workers.
e. peaked in 1831 before falling rapidly.

john maynard keynes developed new economic theories in response to the : b) great depression of the 1930s. his theories are so important that they are known as "keynesianism". in his works he supports the idea of a government with deeper involvement and intervention to end the great depression.

a. by accepting the election of president abraham lincoln in 1860 and convincing other southern states to do the same