Brent Pipes, the owner of Brent Pipes Plumbing, started an apprenticeship program for new employees. Five years later, you are asked to evaluate the results. Based on your knowledge of these programs, how would you assume the apprenticeship program has affected the value of Brent Pipes' human capital? a. The value has not changed. b. The value has decreased. c. The value has increased. d. The value fluctuates depending on the company's current projects