It seems you are trying to answer questions from an exam. From my experience the best way is to understand how the different tools by Microsoft work/ integrate together to achieve certain results.
- Data Classification Services integration - https://learn.microsoft.com/en-us/defender-cloud-apps/dcs-inspection
- Microsoft Power Automate - https://learn.microsoft.com/en-us/power-automate/getting-started
- The Built-in DLP inspection method in Microsoft Defender for Cloud Apps (formerly Microsoft Cloud App Security) has been retired for new policy configurations.
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