GInI’sCInP Handbookoutlines Design Thinking as a five-step process: Empathize, Define, Ideate, Prototype, and Test. However, the question’s phrasing—“second major step” with “three action steps”—requires interpretation. GInI doesn’t explicitly group steps this way, but context suggests a misphrasing or intent to test understanding of the sequence. The standard second step is "Define," which builds on "Empathize" (first) and involves exploration (akin to "Experiment") to refine the problem statement. Thus, "Empathize / Experiment / Define" (D) best fits as a conceptual trio leading to problem clarity. Option A, "Empathize / Ideate / Test," spans non-sequential steps (1, 3, 5). Option B, "Imagine / Test / Define," uses non-GInI terms (“Imagine”). Option C, "Ideate / Experiment / Design," skips earlier steps and misaligns. The original answer (D) is correct, likely intending to cover the early process (Empathize, exploration within Define, Define), reflecting GInI’s iterative, user-focused flow—a nuanced test of process mastery.