Footville's Production Possibilities

Shoes Socks

800 0

600 400

400 700

200 900

0 1,000

Which of the following statements is correct?

a. Footville's production possibilities frontier is a straight, downward-sloping line.

b. The opportunity cost of an additional 200 shoes is constant at 300 socks.

c. The opportunity cost of an additional 200 shoes is constant at 200 socks.

d. The opportunity cost of an additional 200 shoes increases as more shoes are produced.