Apex domains cannot have CNAME records.
Question and response
Question
dig mbix.ca. NS
Answer
mbix.ca. 5 NS ns1.d-zone.ca.
mbix.ca. 5 NS ns1.mbix.ca.
mbix.ca. 5 NS ns2.d-zone.ca.
mbix.ca. 5 NS ns2.mbix.ca.
Authority
The response has no authority records.
Additional
ns1.mbix.ca. 5 A 198.181.199.130
ns1.d-zone.ca. 5 A 162.219.54.2
ns2.mbix.ca. 5 A 198.181.199.131
ns2.d-zone.ca. 5 A 162.219.55.2
ns1.mbix.ca. 5 AAAA 2602:fd53:11e:53:0:0:0:1
ns1.d-zone.ca. 5 AAAA 2620:10a:80eb:0:0:0:0:2
ns2.mbix.ca. 5 AAAA 2602:fd53:11e:53:0:0:0:2
ns2.d-zone.ca. 5 AAAA 2620:10a:80ec:0:0:0:0:2
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0