Apex domains cannot have CNAME records.
Question and response
Question
dig rentamulticopias.com. NS
Answer
rentamulticopias.com. 5 NS ns1.rentamulticopias.com.
rentamulticopias.com. 5 NS ns2.rentamulticopias.com.
Authority
The response has no authority records.
Additional
ns1.rentamulticopias.com. 5 A 2.59.171.102
ns2.rentamulticopias.com. 5 A 41.216.176.37
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0