【单选题】Assume for Namibia that the opportunity cost of each hut is 200 bowls. Which of these pairs of points could be on Namibia 's production possibilities frontier?
A.
(200 huts, 30,000 bowls) and (150 huts, 35,000 bowls)
B.
(200 huts, 40,000 bowls) and (150 huts, 30,000 bowls)
C.
(300 huts, 50,000 bowl) and (200 huts, 60,000 bowls)
D.
(300 huts, 60,000 bowls) and (200 huts, 80,000 bowls)