B because if its unneccsary they dont put it in models
<span>War communism was the name given to an economic system that existed in Russia from 1918 to 1921.War communism was introduced by Lenin to combat economic problems brought on by the civil war in Russia .....One of the first measures of War Communism was the nationalization of land.</span>
The Colorado River was like otherwise rivers but due to overuse for it's water to humans and agriculture and also with the poor manegnent of the river, The rivers has become an environmental problems, Threatening species around the river that Daily depended on the vezitation and fresh water it got from the river. The river is expected to have it's water flow cut completely soon so that will also mean the shut down of hydroelictric dams.
I hope I was a help.
Constantine made the edict of milan and changed the capital.
