Under the constitution, what does the principle of "federalism" mean?
select one:
a. power is shared by state and national governments.
b. power divided into three branches of government.
c. power is limited to what is listed in the amendments.
d. power is granted to the states only through amendments.

(d) rivers.

explanation:

civilizations developed around rivers because their waters provided places to hunt and fish. also, as the rivers flooded, the lands around them became fertile. this allowed them to support farming. this is especially true of the nile river, which flooded the same time each year.

a, c, & d are correct:

they wanted lands to settle the extra population.

they wanted new markets for english goods.

they wanted to avoid civil war.