Apex domains cannot have CNAME records.
Question and response
Question
dig centeradvocates.org. NS
Answer
centeradvocates.org. 5 NS ns-383.awsdns-47.com.
centeradvocates.org. 5 NS ns-1591.awsdns-06.co.uk.
centeradvocates.org. 5 NS ns-998.awsdns-60.net.
centeradvocates.org. 5 NS ns-1798.awsdns-32.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0