A SysOps administrator is deploying a fleet of over 100 Amazon EC2 instances in an Amazon VPC. After the instances are set up and serving clients, a new DNS server needs to be added to the instances for DNS resolution.
What is the MOST efficient way to make this change?

A. Update the DHCP options set for the Amazon VPC.
B. Use AWS OpsWorks to update the DNS server configuration for each instance.
C. Use AWS Systems Manager to update the DMS server configuration for each instance.
D. Write a script to update the DNS server configuration for each instance.