Apex domains cannot have CNAME records.
Question and response
Question
dig mrcarart.com. NS
Answer
mrcarart.com. 5 NS ns-852.awsdns-42.net.
mrcarart.com. 5 NS ns-1713.awsdns-22.co.uk.
mrcarart.com. 5 NS ns-1375.awsdns-43.org.
mrcarart.com. 5 NS ns-2018.awsdns-60.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0