The answer should be A, the age difference between participants.
Answer: eustress
Explanation:
kind of stress associated with positive feelings, optimal health, and performance. A moderate amount of stress can be beneficial in challenging situations.
Athletic issues is not a special needs issue.
4= very brisk, hyper active w/ clonus, indicative of disease
3= brisker than average, may indicate disease
2= average, normal
1= diminished, low normal