The question directly references "reinforcement mechanisms," which GInI defines as tools or strategies used by Program Leaders to maintain continuous engagement in an innovation program. These might include rewards, recognition, or feedback loops that sustain momentum over time. TheCInP Handbookunderscores their importance in keeping participants motivated and active. Options A ("structural mechanisms"), C ("enabling devices"), and D ("support structures") are not terms GInI uses in this context, making B the straightforward and correct answer as it matches the question’s phrasing and intent.