Which of the following is true regarding early agricultural societies? A. The food supply became more reliable. B. The diet became more varied. C. Social and economic exploitation increased. D. Diseases became less of a problem

The answer I would expect, and the one given most often on line, is A. There is definite evidence for this - it is one major reason that the population tends to increase wherever agriculture is adopted in history - however, there is also evidence for C depending on which societies you are looking at, so to be sure of the answer you should refer to your course material.