Private investment expenditure, adds to the nation's existing stock of capital

Involuntary part-time workers are workers who

A) work less than 35 hours but would like to work full time. B) work more than 35 hours but would like to work less than 35 hours. C) work have lost their jobs within the last four weeks and are seeking another job. D) work less than 35 hours by choice. E) have withdrawn from the labor market.

Refer to the information provided in Figure 16.3 below to answer the question(s) that follow.  Figure 16.3Refer to Figure 16.3. The efficient level of output of this product is

A. 0. B. 15. C. 20. D. indeterminate from this information.