Apex domains cannot have CNAME records.
Question and response
Question
dig mminternet.com. NS
Answer
mminternet.com. 5 NS ns.mminternet.com.
mminternet.com. 5 NS ns2.mminternet.com.
Authority
The response has no authority records.
Additional
ns.mminternet.com. 5 A 216.86.201.8
ns2.mminternet.com. 5 A 216.86.207.10
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0