Apex domains cannot have CNAME records.
Question and response
Question
dig fumc-urbana.org. NS
Answer
fumc-urbana.org. 5 NS ns-1455.awsdns-53.org.
fumc-urbana.org. 5 NS ns-967.awsdns-56.net.
fumc-urbana.org. 5 NS ns-586.awsdns-09.net.
fumc-urbana.org. 5 NS ns-1671.awsdns-16.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0