Triage drill

Classify each situation into the triage bins (1 = answer now, 2 = return later, 3 = eliminate-and-guess) — return the bin number for the FIRST situation only, as described: Situation A: an MCQ where you can name the mechanism and see the finish line (return this bin). Situation B: a heavy trace that will take real time — mark it. Situation C: 30 honest seconds and you cannot name the mechanism.