A - More sophisticated civilizations
This is because specialization of labor lead to certain occupations and a wider variety of jobs. Because of this, civilizations began to advance in a, for lack of better term at the moment, orderly fashion.
B is incorrect as it allowed them to move on from just agricultural production to other forms of labor such as sribes and such.
C is incorrect as it lead to increased urbanization.
D is incorrect as they (citizens at that time period) moved from hunting and gathering to agricultural production and a settled life style.
Hope this helps!
