Graph of TB & TC of Hours Working: The graph below measures salary (thousands per year) and perceived costs from working for a single worker. The worker perceives their total cost equation for working to beTC =. The horizontal axis measures the hours of working per week that they can choose, giving them a total benefit of working equation,TB =. (For hours beyond 40, assume thatTC>TB.)

For the question below, use the following table in conjunction with the Figure:Graph of TB & TC of Hours Working.

Point Q TB TC NB MC

I 7.215 8.102

C 14.43 10.170 6.039 1.123

F 21.65

B 28.86 32.410 1.960

Which of the points corresponds to where the NB is zero?

A. I

B. B

C. C

D. F

E. None of the above

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