For the change of side feature, what is required from at least 1/4 of the team according to Group C?

The requirement that involves at least 1/4 of the team needing to regrasp during the change of side feature is crucial for demonstrating the skill level and synchronization of the skaters. Regrasping denotes a clear transition and coordination among team members. When performers regrasp, it not only showcases their ability to maintain fluid motion while executing the maneuver but also highlights the importance of teamwork and timing in synchronized skating. This pivotal action serves to enhance the visual impact of the routine, demonstrating the complexity involved in the change of side, and solidifies the emphasis on interdependence among the skaters.

The other options do not align with the specific requirements set forth for this feature. While various formations and patterns are important in synchro skating, the unique aspect of requiring regrasping is essential to achieving the desired level of execution and artistic impression associated with this move.