Apex domains cannot have CNAME records.
Question and response
Question
dig qaventria.com. NS
Answer
qaventria.com. 2 NS ns-746.awsdns-29.net.
qaventria.com. 2 NS ns-7.awsdns-00.com.
qaventria.com. 2 NS ns-572.awsdns-07.net.
qaventria.com. 2 NS ns-1062.awsdns-04.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0