A historian could BEST use both sources together to support which of the following claims? a) Agricultural abundance from maize cultivation permitted the development of a warrior class that conquered neighboring territories b) Domesticated maize eventually produced an agricultural surplus that allowed labor specialization including artisans c) Harnessing the energy of domesticated animals allowed Olmec artisans to transport massive basalt boulders d) Surplus food allowed Olmec rulers to create an empire by conquering surrounding states