A supplier catalog import uses category values such as 'apparel', 'Apparel', and 'Clothes' for similar products. Text exhibit: A category mapping exhibit titled Product Category Cleanup. Columns: imported_category, approved_category, status. Rows: apparel Match; Apparel Match; Clothes Apparel Review highlighted; snack Snacks Match. A note reads Unmatched or uncertain values go to exceptions log before posting. Which practice best preserves usable reporting categories?