If Labor Is the Only Variable Input,an Increase in the Quantity

If labor is the only variable input,an increase in the quantity of labor:

A) does not have any effect on the quantity of output.
B) causes the output to increase initially at a diminishing rate and then at an increasing rate.
C) causes the output to increase at a constant rate till the last worker is hired.
D) causes the output to increase initially at an increasing rate and then at a decreasing rate.
E) causes the output to decrease at a constant rate till the last laborer is hired.

Correct Answer:

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