Apex domains cannot have CNAME records.
Question and response
Question
dig rosnermedia.com. NS
Answer
rosnermedia.com. 1 NS ns4fmw.name.com.
rosnermedia.com. 1 NS ns2fwz.name.com.
rosnermedia.com. 1 NS ns1dns.name.com.
rosnermedia.com. 1 NS ns3bfm.name.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0