Apex domains cannot have CNAME records.
Question and response
Question
dig delasalle.edu.do. NS
Answer
delasalle.edu.do. 4 NS ns2.inmotionhosting.com.
delasalle.edu.do. 4 NS ns1.inmotionhosting.com.
Authority
The response has no authority records.
Additional
ns2.inmotionhosting.com. 4 A 70.39.150.2
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0