Originally, there were just groups of nomads, and when they came together, they were able to rely on methods of farming. After thousands of years of improving their ways of farming, there was a surplus of foods, and so this enabled some to not be required to farm. This caused the exploration and discovery of many new topics and ways of life, improving technology and ways of life. Cuneiform was a form of writing created by Sumerian priests, but did not help them with advancement in technology, A is not right, and not likely to be C
