Apex domains cannot have CNAME records.
Question and response
Question
dig aaabrasives.com. NS
Answer
aaabrasives.com. 5 NS melody.ns.cloudflare.com.
aaabrasives.com. 5 NS elliot.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0