The law of diminishing marginal utility states that it is impossible to produce more of one good without decreasing the quantity produced of another good

Landon demands more sushi as his income increases. From this we can conclude that, for Landon

A) sushi is a normal good. B) sushi is a substitute good. C) sushi is a complementary good. D) sushi is an inferior good.

An oligopolist cannot use the MR = MC rule to find its equilibrium output level because

a. oligopolists do not face stable demand curves for their output b. oligopolists do not try to maximize profits in the long run c. it is too difficult to estimate marginal cost d. the rule applies only in perfect competition e. the minimum efficient scale exceeds total quantity demanded