The evidence that the Olmec civilization had specialized labor is found in option C) "There is evidence of a hierarchical social structure."
The Olmec civilization, known for its colossal stone heads and other impressive artifacts, displayed a social structure that suggests specialized roles and labor.
Archaeological findings indicate a hierarchy with elites who likely specialized in religious, political, or administrative roles, while other members of the society engaged in various forms of labor such as farming, crafting, and construction.
This hierarchical organization implies a division of labor, demonstrating that different individuals within the Olmec society had specific roles and responsibilities, supporting the notion of specialized labor.