What does it mean when one want to configure white label name servers in AWS.

Answer options:

A.This is when you want to configure EC2 Instances for the first time
B.This is when you want to configure placement groups for the first time.
C.This is when you to configure AMI’s for EC2 Instances
D.This is when you want to have name servers in Route53 to be the same as the domain name of your hosted zone

Answer - D
This is given in the AWS documentation
Each Amazon Route 53 hosted zone is associated with four name servers, known collectively as a delegation set. By default, the name servers have names like ns-2048.awsdns-64.com. If you want the domain name of your name servers to be the same as the domain name of your hosted zone, for example, ns1.example.com, you can configure white label name servers, also known as vanity name servers or private name servers.
For more information on migrating DNS, please visit the below link
http://docs.aws.amazon.com/Route53/latest/DeveloperGuide/white-label-name-servers.html