Apex domains cannot have CNAME records.
Question and response
Question
dig modernsurvey.com. NS
Answer
modernsurvey.com. 5 NS ns-1538.awsdns-00.co.uk.
modernsurvey.com. 5 NS ns-1442.awsdns-52.org.
modernsurvey.com. 5 NS ns-232.awsdns-29.com.
modernsurvey.com. 5 NS ns-927.awsdns-51.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0