Apex domains cannot have CNAME records.
Question and response
Question
dig d-zone.ca. NS
Answer
d-zone.ca. 5 NS ns2.d-zone.ca.
d-zone.ca. 5 NS ns3.cira.ca.
d-zone.ca. 5 NS ns4.cira.ca.
d-zone.ca. 5 NS ns1.d-zone.ca.
Authority
The response has no authority records.
Additional
ns1.d-zone.ca. 5 A 162.219.54.2
ns2.d-zone.ca. 5 A 162.219.55.2
ns3.cira.ca. 5 A 192.174.68.100
ns4.cira.ca. 5 A 176.97.158.100
ns1.d-zone.ca. 5 AAAA 2620:10a:80eb:0:0:0:0:2
ns2.d-zone.ca. 5 AAAA 2620:10a:80ec:0:0:0:0:2
ns3.cira.ca. 5 AAAA 2001:67c:1bc:0:0:0:0:100
ns4.cira.ca. 5 AAAA 2001:67c:10b8:0:0:0:0:100
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0