Apex domains cannot have CNAME records.
Question and response
Question
dig sellingarizonasunshine.com. NS
Answer
sellingarizonasunshine.com. 5 NS ns1.sellingarizonasunshine.com.
sellingarizonasunshine.com. 5 NS ns2.sellingarizonasunshine.com.
Authority
The response has no authority records.
Additional
ns1.sellingarizonasunshine.com. 5 A 157.254.12.55
ns2.sellingarizonasunshine.com. 5 A 91.223.3.154
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0