When demand is unit elastic, a change in price causes total revenue to stay the same because A. total revenue never changes with price changes. B. the percentage change in quantity demanded exactly offsets the percentage change in price. C. the change in profit is offset by the change in production cost. D. buyers are buying the same quantity.

Specialization—the division of labor—enhances productivity and efficiency by a) allowing workers to take advantage of existing differences in their abilities and skills. b) avoiding the time loss involved in shifting from one production task to another. c) allowing workers to develop skills by working on one, or a limited number, of tasks. d)all of the means identified in the other answers.

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?

China white was the black market selling of ivory, in which the profit was redistributed back into the trafficking of heroin.