The answer is B. Hope that helps!
Benefits- The people have choice in who runs the country and which laws to place, and No rash decisions can be made without confirmation from multiple parties
Challenges- the first voting of the new leader, and setting up representatives for the new government
Agricultural Revolution (begins in 18th c.)--Industrial Revolution (begins in late 18th c)--Urbanization--World population hits 1 billion (1804)--Flu Pandemic (1918)
Not sure if "dramatic population growth in developing countries" is a separate choice or part of the population hitting 1 billion. Population growth occurred through this whole time period but particularly after the Agricultural Revolution as it produced better food more cheaply. This boom would allow for more people to be available to work in industry as it develops.
............were from eastern and southern Europe.
I think its A centralized absolute power in one ruler and B eliminated the senate
