What are possible explanations for the fact that you (for example) may require twice as much of a drug to get an effect as does your friend?

Ayouth soccer player has a medical condition that makes it easy for him to fall and injure himself if he loses balance. what modifications might be appropriate for informal play? a. limit his access to the game and use him only as a supporting player. b. change the rules to make it easier for him to score and win the game. c. alter game rules and guidelines to eliminate player-to-player physical contact. d. reduce the number of players to potentially reduce the risk of physical contact.