Apex domains cannot have CNAME records.
Question and response
Question
dig blog-thebusinessmd.net. NS
Answer
blog-thebusinessmd.net. 4 NS ns2.blog-thebusinessmd.net.
blog-thebusinessmd.net. 4 NS ns1.blog-thebusinessmd.net.
Authority
The response has no authority records.
Additional
ns1.blog-thebusinessmd.net. 4 A 69.162.109.202
ns2.blog-thebusinessmd.net. 4 A 69.162.109.206
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0