Concept:An economic problem exists because human wants are unlimited while resources are limited, forcing people to make choices.Explanation:The economic problem arises from the fundamental issue of scarcity.Because resources are scarce, individuals and societies must decide how to allocate them among competing wants.This necessity to choose among alternatives is what creates the economic problem.Therefore, the condition for an economic problem is the presence of both scarcity and choice.Answer:B. Scarcity and choices are involved