The Following Table Shows the Output of Chairs Produced by a Firm

Multiple Choice

The following table shows the output of chairs produced by a firm at different units of capital rented. The price per chair is $10.

-Refer to the table above.When does diminishing marginal returns to capital set in?

A) When the second machine is used
B) When the third machine is used
C) When the fourth machine is used
D) When the fifth machine is used