Apex domains cannot have CNAME records.
Question and response
Question
dig therapistville.com. NS
Answer
therapistville.com. 5 NS ns-1224.awsdns-25.org.
therapistville.com. 5 NS ns-552.awsdns-05.net.
therapistville.com. 5 NS ns-587.awsdns-09.net.
therapistville.com. 5 NS ns-1115.awsdns-11.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0