The correct answer is A. They needed more reliable sources of food and supplies.
Step-by-step explanation:
Before the Neolithic, most human groups were hunter-gatherers this means to obtain food including fruits, plants, or meat from animals they hunted animals and collected resources moving from one area to another as they depended on the availability of animals and plants in each area. This made the availability of sources changing and unreliable. Additionally, this inconvenience was solved through the domestication of animals and plants, which guaranteed human groups could have resources all the time. According to this, one reason for domestication was that humans "needed more reliable sources of food and supplies".