Apex domains cannot have CNAME records.
Question and response
Question
dig mywhc.ca. NS
Answer
mywhc.ca. 5 NS ns3.whc.ca.
mywhc.ca. 5 NS ns1.whc.ca.
mywhc.ca. 5 NS ns2.whc.ca.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0