What defines a Difficult Supporting Base in Group Lifts?

A Difficult Supporting Base in Group Lifts is defined by the requirement that supports must be visibly held during the lift. This means that the skaters providing support must maintain their hold on the lifted skaters throughout the duration of the lift, clearly demonstrating that they are actively engaged in supporting them. This visibility is crucial as it not only showcases the strength and stability of the support but also emphasizes the coordination and teamwork involved in executing the lift successfully.

The other options do not adequately represent what defines a Difficult Supporting Base. While having only one supporting skater or ensuring all skaters execute a team routine simultaneously may contribute to the complexity of a performance, they do not specifically outline a requirement related to the nature of the support in group lifts. Additionally, not allowing supporting skaters to be in fixed positions would relate to the dynamics of movement rather than the criteria for defining the difficulty or effectiveness of the support itself. Therefore, the emphasis on visibly held supports is what clearly identifies a Difficult Supporting Base.