I believe the answer is D, hope it helps!
Answer:
The emergence of agriculture allowed humans to create permanent settlements with the hope of a stable food supply. ... Increasing temperatures opened the door for humans to learn how to cultivate wild plants, while new tools allowed humans to better manage crops and increase crop yields.
The answer to this statement whether if it is true or false is that, it is false. It is because self-regulated people can create an environment that produces trust and fairness but because self-regulated people tend to be more controlling to their behavior and emotions, it does not necessarily that they can only produce fairness. While political behavior can be reduced based on some instances but it does not necessarily impact of the behavior and infighting to be reduced within the instance though productivity is high.
