A recycling-sort pile over-represents bottles, was padded with synthetic cans, has empty nights, covers only weekday routes, and never saw the high end of contamination. Which mitigation should the tester pick?

Over-represented bottles, synthetic-can padding, empty nights, weekday-only routes, and a missing high-contamination range are imbalance, augmentation skew, missingness, narrow use-cases, and incomplete ranges. Data representativeness testing is the bundle. Constraint testing, a Chapter 6 drift method, and leftover-column feature testing each grab one wrong door.