Apex domains cannot have CNAME records.
Question and response
Question
dig ridinglawnmowersafety.com. NS
Answer
ridinglawnmowersafety.com. 5 NS ns-1568.awsdns-04.co.uk.
ridinglawnmowersafety.com. 5 NS ns-747.awsdns-29.net.
ridinglawnmowersafety.com. 5 NS ns-128.awsdns-16.com.
ridinglawnmowersafety.com. 5 NS ns-1248.awsdns-28.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0