Apex domains cannot have CNAME records.
Question and response
Question
dig qualityassessors.co.ke. NS
Answer
qualityassessors.co.ke. 4 NS ns1.olitt.net.
qualityassessors.co.ke. 4 NS ns1.olitt.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0