A typical professional National Football League team has three quarterbacks on its roster. What is one reason why they might not have a fourth quarterback?
A) The fourth quarterback’s marginal product is approximately zero.
B) The fourth quarterback’s marginal product is approximately ten.
C) The fourth quarterback’s marginal product is less than the first quarterback’s marginal product.
D) There is a law against carrying four quarterbacks on a team.
ANSWER
A
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