Why did the greek historian herodotus call egypt "the gift of the nile"? choose all answers that are correct.
a. the nile provided water.
b. the nile was an abundant source of precious stones.
c. the nile gave the egyptians more access to trade.
d. the nile deposited fertile soil.

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.