To a Firm Facing Constant Input Prices, Increasing Marginal Returns

Multiple Choice

To a firm facing constant input prices, increasing marginal returns

A) means that each additional unit of output costs more to produce than the previous unit
B) means that the marginal product of the variable input decreases as more of the input is used
C) can occur due to specialization and division of labor
D) usually occur at very high rates of output
E) can never occur