If the marginal physical product of the fourth acre of land used were 10, the MPP of the fifth acre were 6, the MPP of the sixth acre were 2, the MPP of the seventh acre were 0, and the MPP of the eighth acre were -3, what is the maximum number of acres of land that would be used?

A. 4
B. 5
C. 6
D. 7


C. 6

Economics

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