When economists refer to "demand," they are speaking of: how much everyone wants of all products bought and sold in the nation. a schedule of amounts of a product that buyers would purchase at alternative prices in a given time period. a single price and quantity combination. a "desire" for a product rather than a "need" for the product regardless of the price. all of the above?

David paid $975,000 for two beachfront lots in coastal south carolina, with the intention of building residential homes on each. two years later, the south carolina legislature passed the beachfront management act, barring any further development of the coast, including david's lots. when david files a complaint to seek compensation for his property, south carolina refuses, pointing to a passage in david's own complaint that states "the beachfront management act [was] properly and validly designed to south carolina's " is south carolina required to compensate david under the takings clause?