I believe the answer is B.
I would say the answer is All of the above
Answer:
B. Modifying the rules
Explanation:
The answer is not A because there's no rule that the team must be rotated.
As for increasing or decreasing the difficulty, it is really subjective to the point of view of each team.
Therefore, the answer is "modifying the rules".
Depending on your tolerance to any type of drugs is how they will determine, your weight may be a factor but if you are still having pain after a certain amount of time they will up the dose of the medicine