[Solved] Differences in right- and left-handed fingerprint ridges are greater for heterosexual males than for gay males. Researchers have attributed this to A) erotic plasticity. B) prenatal hormones. C) refractory periods. D) basal metabolic rates. Working Home: The act of performing one’s job duties from one's place of residence rather than in a traditional office environment. Often referred to as "working from home" or "remote work." Marginal Cost: The increase or decrease in the total cost that arises when the quantity produced is incremented by one unit. Labor Force: The total number of people who are currently employed or actively seeking employment within an economy. Opportunity Cost: Represents the value of the best alternative that is foregone when a decision is made to pursue a certain action.