Apex domains cannot have CNAME records.
Question and response
Question
dig ised.edu.do. NS
Answer
ised.edu.do. 5 NS edna.ns.cloudflare.com.
ised.edu.do. 5 NS wells.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0