GInI’s CInP Handbook outlines 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.