A straight-line demand curve has the same elasticity throughout its length

From the economic point of view, why might a sophomore in college spend a great deal of time getting to know an attractive classmate rather than getting to know the issues behind the president's deficit-reduction policies?

A) She is selfish. B) She considers it a more productive use of her time. C) She obviously has no interest in politics. D) The federal budget deficit cannot possibly affect her life.

Economies of scale occur when

A) a firm's long-run average total costs fall as it increases the quantity of output it produces. B) the marginal product of labor is greater than the average product of labor. C) short-run marginal cost falls. D) the demand for a firm's output increases.