Which of the two Metadata folders needs to be updated with your extension records in...

Comprehensive and Detailed 100to 150 words of Explanation From Copado Extension builder topics:

The two metadata folders that need to be updated are the StaticResource and customMetadata folders. Option C is correct because Copado Extension records are packaged through a combination of static resource content and custom metadata configuration. The StaticResource folder stores the generated extension file, such as the JSON file containing selected Function or Job Template records. The customMetadata folder stores the metadata configuration that references or describes the extension so Copado can process it during installation. This structure allows Copado data records to be transported through a Salesforce package. The other options either use incorrect folder names, describe file extensions instead of folders, or refer to folder names that are not part of the expected extension packaging process.