Apex domains cannot have CNAME records.
Question and response
Question
dig studio-o.com. NS
Answer
studio-o.com. 1 NS ns1.studio-o.com.
studio-o.com. 1 NS ns2.studio-o.com.
Authority
The response has no authority records.
Additional
ns1.studio-o.com. 1 A 209.135.168.197
ns2.studio-o.com. 1 A 209.135.168.197
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0