C. The people of Russia had an election and voted to become a communist country.
The Byzantine Empire lasted so long because of the Greeks.
The scientific method was discovered in 1561-1626 by Sir Francis Bacon. A scientific method is when the experimenter creates a hypothesis to test it out and make sure it is correct for its project.
British forces ended up fighting a war in China that benefitted drug smugglers. Their subsequent victory in the conflict opened up the lucrative Chinese trade to British merchants.