What best describes the impact of people changing from hunter-gatherers to living in permanent agricultural societies? A.)Hunter-gatherers relied on a narrower variety of foods compared to grain producing agricultural societies.B.) Hunter-gatherers made little impact on the land versus “slash and burn” techniques used by agricultural societies.C.) Hunter-gatherers domesticated more animals during the winter months compared to agricultural societies.D.) Hunter-gatherers endangered many species due to overkilling compared to agricultural societies.

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Some groups who had migrated up the rift from Africa had wound up turning east. On the site of present-day Iraq, they discovered a favorable location for settlement called Mesopotamia. The Tigris and Euphrates rivers that flowed through the land deposited such rich soil that historians have named the region the Fertile Crescent. The first agricultural revolution took root in Mesopotamia as early as 9000 BC. Mesopotamia became noted for its grain production.
Humans progressed from being food gatherers to food producers. They learned how to grow wild foods from seeds. They began figuring out the best time to plant their crops and how much rain to expect, and adapting to environmental factors like floods or droughts. The easiest way to clear the land was the “slash and burn” technique. Farmers readied the land for planting crops by burning off existing vegetation. But after a few years, the nutrients of the soil became depleted. The farmers would move on to new territory to begin the cycle again. Eventually, farmers learned to replace soil nutrients with fertilizers. This enabled them to remain in permanent locations working the same fields.
Humans also began to domesticate animals. From the start, humans and dogs had bonded. The earliest humans used dogs as hunting companions. One site in Siberia held fossilized remains of dogs from 30,000 years ago. The humans who buried them left evidence suggesting they considered these animals to be special. Dogs were easy to domesticate, but it was 9000 BC before humans domesticated other animals. Keeping herds of sheep, goats, pigs, and cattle ensured a steady supply of meat, dairy products, leather, and wool. 
The switch to agriculture had some negative consequences. People relied on a narrower variety of foods. Diets became less nutritious than in the hunting-gathering days. In grain-producing regions, diets were poorly balanced and too high in starches. Farming was also a laborious way of life. As a result, many people sought a middle ground between foraging and farming. Raising livestock provided an alternative. But flocks of farm animals sometimes grazed the grasslands down to the roots. Then the herders were forced to move around in search of more pasture land. Some herdsmen adapted by limiting their flocks to fewer animals.
I think it might be b but I'm not sure
B is incorrect.
Well, shoot! According to your text, B is correct. But I disagree with that. However, you need to answer the question acc to your text.
yes b was correct