Can a user associate and use his own DNS with ELB instead of the DNS provided by AWS ELB?

A.
Yes, by creating a CNAME with the existing domain name provider

B.
Yes, by configuring DNS in the AWS Console

C.
No

D.
Yes, only through Route 53 by mapping ELB and DNS

Explanation:
The AWS ELB allows mapping a custom domain name with ELB. The user can map ELB with DNS in two ways:
1) By creating CNAME with the existing domain name service provide
OR
2) By creating a record with Route 53
http://docs.aws.amazon.com/ElasticLoadBalancing/latest/DeveloperGuide/using-domain-names-with-elb.html