In a world of scarcity, . Multiple choice question. consumers or producers will always behave in a manner in which marginal benefits (MB) are less than marginal costs (MC) the decision to obtain the marginal benefit (MB) of a specific option always includes the marginal cost (MC) of forgoing something else the decision to obtain the marginal benefit associated with some specific option includes the total cost of forgoing something else consumers or producers will always behave in a manner in which marginal benefits (MB) are less than average costs (MC)