It's A
Irrigation was overused, the soil didn't get any rest (crop rotation is a younger invention), the result was salinization of the soil, which led to decline of Sumer.
Answer:
As the first Roman emperor to claim conversion to Christianity, Constantine played an influential role in the proclamation of the Edict of Milan in 313, which decreed tolerance for Christianity in the empire. He called the First Council of Nicaea in 325, at which the Nicene Creed was professed by Christians.
Explanation:
The capital(which should be the biggest) is Tenochtitlan.
Answer:
small states.
Explanation:
the New Jersey Plan favor maintaining a one house congress with each state being equally represented .