Apex domains cannot have CNAME records.
Question and response
Question
dig constructionsmartincousineau.com. NS
Answer
constructionsmartincousineau.com. 5 NS ns-633.awsdns-15.net.
constructionsmartincousineau.com. 5 NS ns-1319.awsdns-36.org.
constructionsmartincousineau.com. 5 NS ns-1358.awsdns-41.org.
constructionsmartincousineau.com. 5 NS ns-1774.awsdns-29.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0