A Multiple Baseline Design across Subjects is the most appropriate experimental design for Hollys scenario This design allows for the systematic evaluation of an interventions effect across several individuals Hollys team members by introducing the intervention to each subject at different times while maintaining baseline conditions for others This staggered introduction provides a clear demonstration of experimental control without requiring the withdrawal or reversal of the intervention which could be impractical or undesirable in an organizational setting where increased productivity is the goal It is also highly practical given Hollys limited time and resources as she can implement the intervention sequentially rather than simultaneously across all team members making the initial rollout more manageable A Reversal ABAB design would require withdrawing the reinforcement which might negatively impact productivity and morale An Alternating Treatments design is used to rapidly compare the effects of two or more interventions which might be too complex for immediate implementation with limited resources A Changing Criterion design is typically used for behaviors that are already in the learners repertoire and can be gradually increased or decreased which is not the primary aim here