GInI’s CInP Handbook includes " Build to Compare " among the 12 Purposes of Prototyping, where teams create prototypes to benchmark new solutions against existing ones—e.g., comparing usability or value—to identify improvements. This evaluative purpose, often in the Test phase, ensures the innovation outperforms alternatives, directly addressing customer problems. " Build to Empathize " (A) focuses on understanding, not comparison. " Build to Decide " (B) chooses between options, not benchmarks. " Build to Learn " (C) explores feasibility, not competitive positioning. Option D matches GInI’s exact purpose, aligning with the original answer, reflecting a strategic, customer-centric use of prototyping—a GInI tactic for differentiation.