Answer:
D. An embargo on oil and weapons for all warring nations
In the ancient Sumerian society, the priests were so influential because people thought that they were the representatives of God. People beleived in God but they could not see them. The priests took advantage of the fear of god among people to become very influential in the Sumerian society. The common people were of the opinion that the Gods used to speak to them through the help of these priests. The priests were so powerful during those times that they even became rulers of certain city-states. Actually they were taking advantage of the beliefs of the common people.
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The development of agriculture occur circa around 8000-6000 years ago. It was a time where many nomadc population begin to settle in a place, thus effectively starting the civilization as we know now. it was a huge shift for humanity and it was probably one of the most important, if not the most important achievement in human history.
It was quickly accepted as the preferred food source by people living in settlements because it could be planned and organized, thus helping people reaching a balance easily and preventing them from being dependent from the results of hunt and gathering. it was a safe and sicure way to assure food for everyone.
Have a great day hope that helps