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You need to grant external auditors access to sensitive files for exactly 4 hours, after which the files should no longer be accessible. According to Google's best practices, what is the most efficient method to share these files?
A
Store the file in Cloud Storage. Generate a signed URL with a 4-hour expiry and share it with the auditors.
B
Host a website on Compute Engine instance and expose the files using Public DNS and share the URL with the auditors. Bring down the instance after 4 hours.
C
Store the file in Cloud Storage. Grant the allUsers access to the file share it with the auditors. Remove allUsers access after 4 hours.
D
Host a website on App Engine instance and expose the files using Public DNS and share the URL with the auditors. Bring down the instance after 4 hours.
