The correct answer is: b. Farmers can support more specialists due to surplus food.
Settled farmers can produce more food than they need for their own subsistence, which allows them to support a larger population and create a division of labor. This surplus provides the opportunity for individuals to specialize in various trades, crafts, and professions, leading to advancements in technology and culture. In contrast, nomadic lifestyles generally require individuals to focus on survival and mobility, limiting specialization.