Apex domains cannot have CNAME records.
Question and response
Question
dig dominospizza.net.do. NS
Answer
dominospizza.net.do. 3 NS ns03.dominos.com.
dominospizza.net.do. 3 NS ns04.dominos.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0