Consider the following firms: Net Income this Year Stock price at beginning of year Stock price at end of year Firm A $ 10,000,000 $ 20 $ 10 Firm B $ 8,000,000 $ 10 $ 20 a) The manager of firm A is doing a better job than B b) The manager of firm B is doing a better job than A c) Neither manager is doing a good job d) Both managers are doing a good job