Apex domains cannot have CNAME records.
Question and response
Question
dig bdo.net.do. NS
Answer
bdo.net.do. 5 NS udns1.cscdns.net.
bdo.net.do. 5 NS udns2.cscdns.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0