The consumption function shows the relationship between consumption and:

Elsie is a perfectly competitive dairy farmer. The market price of milk was $2.40 but just fell to $2.20 a gallon. Elsie

A) can sell as much milk as she wants at $2.20 a gallon. B) will have to charge some customers $2.40 a gallon to stay in business. C) will produce the same amount of milk at both prices. D) can sell more at the lower price because the quantity demanded is higher at lower prices. E) will be able to charge her initial customers $2.40 a gallon.

Economic efficiency entails

A) producing a given amount of output with the most expensive mix of inputs. B) producing a given amount of output with the least number of inputs. C) producing a given amount of output with the most inputs. D) producing a given amount of output with the cheapest mix of inputs.