Apex domains cannot have CNAME records.
Question and response
Question
dig adamcomotorsports.com. NS
Answer
adamcomotorsports.com. 5 NS ns-545.awsdns-04.net.
adamcomotorsports.com. 5 NS ns-1106.awsdns-10.org.
adamcomotorsports.com. 5 NS ns-398.awsdns-49.com.
adamcomotorsports.com. 5 NS ns-708.awsdns-24.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0