Karen Is a Network Engineer at ITSec, a Reputed MNC

Karen is a Network engineer at ITSec, a reputed MNC based in Philadelphia, USA. She wants to retrieve the DNS records from the publicly available servers. She searched using Google for the providers DNS Information and found the following sites: http://www.dnsstuff.com https://dnsquery.org Through these sites she got the DNS records information as she wished. What information is contained in DNS records?

A) Information about the DNS logs.
B) Information about local MAC addresses.
C) Information such as mail server extensions, IP addresses etc.
D) Information about the database servers and its services.