struggling with these questions would like some clarification

2. Performance-based contracts in sports are (a) Aimed at giving players an incentive to exert effort. (b) Popular with players because they subject them to performance risk. (c) Not desired by team owners. (d) Prohibited in professional sports. 3. Throughout the history of professional baseball, the minor leagues (a) Have always been affiliated with major league teams. (b) Have never been affiliated with major league teams. (c) Have sometimes been affiliated with major league teams and have sometimes been independent. (d) Have always been profitable. 4. Teams have an incentive to invest in player training (a) In a world of complete free agency. (b) Regardless of what the labor market is like for players who make the majors. (c) Only if players are tied to their original teams for a set number of years before free agency. (d) All of the above. 5. College athletics, especially at the Division I level, (a) Primarily serves an entertainment function. (b) Provides entertainment but also serves as a training ground for some professional sports. (c) Is not highly regulated by the NCAA. (d) Currently allows all players to be paid salaries