Apex domains cannot have CNAME records.
Question and response
Question
dig sfcfarmbureau.com. NS
Answer
sfcfarmbureau.com. 3 NS ns-1793.awsdns-32.co.uk.
sfcfarmbureau.com. 3 NS ns-477.awsdns-59.com.
sfcfarmbureau.com. 3 NS ns-1208.awsdns-23.org.
sfcfarmbureau.com. 3 NS ns-1341.awsdns-39.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0