An enterprise is deploying APIs that utilize a private key and a public key to ensure the connection string is protected. To connect to the API, customers must use the private key. Which of the following would BEST secure the REST API connection to the database while preventing the use of a hard-coded string in the request string? A. Implement a VPN for all APIs. B. Sign the key with DSA. C. Deploy MFA for the service accounts. D. Utilize HMAC for the keys. ~If you could explain why for the correct answer, I’d really appreciate that. Thank you!

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