Gibbons v. Ogden -- interstate commerce
In this case we can infer that, by decreasing the demand (population), the supplying of clothes increases, generating a decrease in the prices of the products, thus causing the demand curve to move to the left, causing the bidders to reduce production costs.
C. possibly don't take my word
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Mary's behavior is an example of learned helplessness, that is a behaviour pattern of a subject that endures repeatedly aversive, violent or traumatic stimuli and becomes unable to escape or avoid them. The subject has a tendency to not accept escape or avoidance as an option in the future.
