Connection between telegraph and trading

Two of these describe "federalism." (choose two answers) select one or more: a. the national government absolutely controls all state governments. b. power is shared by the national and state governments. c. state governments exercise absolute power over the national government. d. it is a compromise meant to eliminate the disadvantages of a "unitary" and a "confederate" system.

As american population grew between 1820 and 1850, the percentage of americans living on farms also grew. a.true b.false

The conclusions presented in this article are based primarily on