When DKIM signing is configured, which DNS record must be updated to load the DKIM public signing key?

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When DKIM signing is configured, which DNS record must be updated to load the DKIM public signing key?
A . AAAA record
B . PTR record
C . TXT record
D . MX record

Answer: C

Explanation:

Reference: https://www.cisco.com/c/en/us/support/docs/security/email-security-appliance/213939-esa-configure-dkim-signing.html