Apex domains cannot have CNAME records.
Question and response
Question
dig bbssu.org. NS
Answer
bbssu.org. 5 NS ns2.bbssu.org.
bbssu.org. 5 NS ns1.bbssu.org.
Authority
The response has no authority records.
Additional
ns1.bbssu.org. 5 A 89.187.73.241
ns2.bbssu.org. 5 A 5.45.95.113
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0