Refer to the graph below. At which point does marginal product (MP) equal average product (AP) at a level of output?

Which of the following is an example of positive technological change?

A) A firm conducts a new advertising campaign. As a result, the demand for the firm's surf boards increases. B) A firm buys an additional machine that it uses to make surf boards. As a result, the firm is able to increase its weekly production of surf boards. C) A firm offers workers a higher wage to work on weekends and at night. As a result, the firm is able to increase its weekly production of surf boards. D) A firm's workers participate in a training program designed to increase the number of surf boards they can produce per day.

The misperceptions theory of short-run aggregate supply curve says that quantity of output will decrease if the price level

a. decreases by more than expected so that firms believe the relative price of their output has decreased. b. decreases by more than expected so that firms believe the relative price of their output has increased. c. decreases by less than expected so that firms believe the relative price of their output has decreased. d. decreases by less than expected so that firms believe the relative price of their output has increased.