Apex domains cannot have CNAME records.
Question and response
Question
dig arbor-education.com. NS
Answer
arbor-education.com. 3 NS ns-1025.awsdns-00.org.
arbor-education.com. 3 NS ns-777.awsdns-33.net.
arbor-education.com. 3 NS ns-225.awsdns-28.com.
arbor-education.com. 3 NS ns-2018.awsdns-60.co.uk.
Authority
The response has no authority records.
Additional
ns-777.awsdns-33.net. 2 A 205.251.195.9
ns-1025.awsdns-00.org. 2 A 205.251.196.1
ns-2018.awsdns-60.co.uk. 2 A 205.251.199.226
ns-225.awsdns-28.com. 2 AAAA 2600:9000:5300:e100:0:0:0:1
ns-777.awsdns-33.net. 2 AAAA 2600:9000:5303:900:0:0:0:1
ns-1025.awsdns-00.org. 2 AAAA 2600:9000:5304:100:0:0:0:1
ns-2018.awsdns-60.co.uk. 2 AAAA 2600:9000:5307:e200:0:0:0:1
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0