Apex domains cannot have CNAME records.
Question and response
Question
dig cpg-gpc.ca. NS
Answer
cpg-gpc.ca. 5 NS ns-1395.awsdns-46.org.
cpg-gpc.ca. 5 NS ns-224.awsdns-28.com.
cpg-gpc.ca. 5 NS ns-850.awsdns-42.net.
cpg-gpc.ca. 5 NS ns-1916.awsdns-47.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0