How does a federal system differ from a unitary system? A. Under a federal system, all power is held by the federal government.
B. Under a federal system, a small group of people holds most government power.
O C. Under a federal system, power is shared among different levels of government.
o
D. Under a federal system, one person holds all governmental power.

i feel as if they would both catch on before to long because they would see them to frequent

its d i know cause i've been googling it

the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.