a. The slope of the PPF between point A and point B is

• -10
• -1/5
• -1/10
• -5

.

b. The slope of the PPF between point B and point C is

• -5
• -1/10
• -10
• -1/15

.

c. The opportunity cost of producing hammers is[ higher / lower ]between points A and B than between points B and C.

d. The opportunity cost of producing screwdrivers is [ higher / lower ]between points A and B than between points B and C