Apex domains cannot have CNAME records.
Question and response
Question
dig risehighnow.com. NS
Answer
risehighnow.com. 5 NS ns-1334.awsdns-38.org.
risehighnow.com. 5 NS ns-723.awsdns-26.net.
risehighnow.com. 5 NS ns-569.awsdns-07.net.
risehighnow.com. 5 NS ns-1557.awsdns-02.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0