Apex domains cannot have CNAME records.
Question and response
Question
dig cif.edu.do. NS
Answer
cif.edu.do. 5 NS ns2.efiservers.com.
cif.edu.do. 5 NS ns2.bdm.microsoftonline.com.
cif.edu.do. 5 NS ns1.bdm.microsoftonline.com.
cif.edu.do. 5 NS ns1.efiservers.com.
Authority
The response has no authority records.
Additional
ns1.efiservers.com. 5 A 198.23.54.154
ns2.efiservers.com. 5 A 198.23.55.153
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0