Which option would violate NCAA regulations concerning prospective student-athlete participation?

Participation in official team practices would violate NCAA regulations concerning prospective student-athlete participation. The NCAA has specific rules that prohibit prospective student-athletes, who are individuals not yet enrolled in college and who have not yet officially joined a college team, from participating in official team practices. This is to maintain the integrity of competition and ensure that only enrolled student-athletes are engaging in team activities that are sanctioned by the NCAA.

In contrast, open events, showcase games, and non-competitive drills on campus can involve prospective student-athletes without violating NCAA rules, as these formats are generally designed for evaluation and recruitment, allowing athletes to be seen by college coaches without crossing the line into official team practices.