In order for a nomadic society to become a unified nation with a complex government, what must happen next?

A)The people must domesticate animals so when they move, the animals come along.B)The people must learn to farm so that they do not have to move around for food.C)The people must build a city so that they can take the time to learn how to farm.D)The people must build a village so that they can take the time to learn how to farm.​