not really understand these questions

14. Bookies expect to make a profit from sports bets because (a) They are irrational. (b) The bet has a positive expected value for the bettor. (c) The bet has a negative expected value for the bettor. (d) None of the above. 15. Racial discrimination in sports markets (a) Has never happened. (b) Is more likely to happen when owners have monopoly power. (c) Does not affect wages or employment levels for minority athletes. (d) Does not affect the quality of play in the league