Which DNS record differentiates A, AAAA, CNAME, and MX records?

• A. A maps to IPv4; AAAA maps to IPv6; CNAME is an alias; MX designates mail servers for a domain.
• B. A maps to IPv6; AAAA maps to IPv4; CNAME maps to an IP; MX is for TLS certificates
• C. A maps to hostnames; AAAA maps to IPv6; CNAME maps to IPv6; MX maps to IP address
• D. A maps to IPv4; AAAA maps to IPv6; CNAME maps to IP; MX designates memory addresses

Answer: (A)