Answer:
Scarcity is one of the key concepts of economics. It means that the demand for a good or service is greater than the availability of the good or service. Therefore, scarcity can limit the choices available to the consumers who ultimately make up the economy.
D is the answer,although this all happened,the response of the great depression was answer D hopes this helps
The monopolist's profit maximizing level of output is found by equating its marginal revenue with its marginal cost, which is the same profit maximizing condition that a perfectly competitive firm uses to determine its equilibrium level of output. Indeed, the condition that marginal revenue equal marginal cost is used to determine the profit maximizing level of output of every firm, regardless of the market structure in which the firm is operating.
Your answer is The Trojan Horse.
http://law.emory.edu/eilr/recent-developments/volume-32/essays/myth-u-n-collective-security.html
