Other things remaining the same, when a fall in the price of one good is followed by an increase in the demand for another good, both goods are said to be:

The long-run average cost curve may initially slope downward due to

A) decreasing average fixed costs. B) increasing marginal returns. C) economies of scale. D) All of the above.

A rational person maximizes

A) risk. B) return. C) expected utility. D) return variance.