Correct Answer: A
Option A is Correct. A secret manager can be used to store API keys, passwords, and certificates.
Option B is Incorrect. Cloud Key Management helps manage encryption keys and cannot be used for storing API keys and certificates.
Option C is Incorrect. The security command center cannot be used for storing API keys and certificates, but it is appropriate to be used to defend Google cloud assets against threats.
Option D is Incorrect. Cloud Key management is an incorrect option.
https://cloud.google.com/security-command-center
https://cloud.google.com/secret-manager
https://cloud.google.com/security-key-management