To identify and classify documents containing sensitive information in Microsoft Teams, SharePoint Online, and Exchange Online within a Microsoft 365 E5 subscription, you should recommend:
B. Data Loss Prevention (DLP)
Data Loss Prevention policies allow you to define rules and conditions to automatically identify and classify sensitive information. You can create custom DLP policies that scan content in Microsoft Teams, SharePoint Online, and Exchange Online for specific sensitive data types (such as credit card numbers, Social Security numbers, or custom-defined data) and take actions like blocking, notifying, or encrypting messages or documents when policy violations occur.
Options A, C, and D are not primarily focused on identifying and classifying documents with sensitive information