An organization wants to automatically apply sensitivity labels to new files uploaded to a SharePoint Online document library that is used to store AI training datasets. The labels should be applied based on sensitive information type detection (SSN, financial account numbers). Without requiring users to manually label files. Which Purview feature achieves this?

B is correct because Microsoft Purview Information Protection auto-labeling policies can be configured to scan SharePoint Online documents and automatically apply sensitivity labels when sensitive information types are detected. An auto-labeling policy scoped to the specific SharePoint site containing AI training datasets, with conditions for SSNs and financial account numbers, will automatically label new and existing files matching the criteria—without requiring user action. A is wrong because a default label on a SharePoint library applies a single label to all files in the library regardless of content; it does not detect sensitive information types to apply contextually appropriate labels. C is wrong because Defender for Cloud Apps file scan can detect sensitive content and apply governance actions, but Purview Information Protection auto-labeling is the purpose-built, tightly integrated feature for sensitivity label application in SharePoint. D is wrong because building a Logic Apps workflow to apply labels requires custom development and ongoing maintenance, duplicating functionality available natively in Purview auto-labeling.