You are triaging a Multi-Source Reasoning prompt about a clothing retailer analyzing sustainable-fashion returns. The tabs are Return Definition: defines avoidable returns and excludes size exchanges; Collection Returns: lists sales, total returns, and size-exchange returns by collection; Lookbook Notes: describes seasonal styling; Supplier Audit: summarizes factory certification status; Store Display Map: shows mannequin positions. The stem asks you to choose the collection whose avoidable return rate stayed above target after size-exchange returns were excluded. Which route best targets relevant evidence?