[Solved] Which of the following was reported by Marshall, Barbaree and Christophe (1986)with regard to incest and non-incest child abusers? A)Incest offenders show more arousal to adult heterosexual stimuli. B)Incest offenders show more arousal to photographs of nude children. C)Incest offenders have lower levels of sexual arousal to stimuli in general. D)Incest offenders become more aroused to all presented stimuli. Marginal Benefit: The additional benefit gained from consuming or producing one extra unit of a good or service. Optimal Number: The most favorable quantity that achieves the best outcome under specific conditions. Individual Marginal Benefit: The additional benefit received by an individual from consuming one more unit of a good or service. Traffic Lights: Traffic lights are signaling devices positioned at road intersections and pedestrian crossings to control the flow of traffic, using a universal color code to signal stop, go, and caution.