A civil war...between the Greeks :)
The Berlin conference was convened to divide the land of Africa among the European nations.
All were popular ideas or inventions in England and came to the colonies with the Puritans.
In the United States, examples of the concurrent powers shared by both the federal and state governments include the power to tax, build roads, establish bankruptcy laws, and to create lower courts.
so i would say C. is the most reasonable.