Demand for the services of Los Angeles Dodgers' pitcher Clayton Kershaw is

A) horizontal.
B) unrelated to his true productivity.
C) an output demand.
D) derived from the demand for Los Angeles Dodgers' tickets when Kershaw plays.

The demand for Clayton Kershaw's services is derived from the demand for Los Angeles Dodgers' tickets, especially when he is playing. Fans' desire to see Kershaw pitch increases ticket sales, which in turn increases the demand for his pitching services. This is an example of derived demand, where the demand for a particular labor (Kershaw's pitching) is dependent on the demand for the product (Dodgers' games) that the labor helps to produce.