A Customer Is Using Multiple AWS Accounts with Separate Billing

Multiple Choice

A customer is using multiple AWS accounts with separate billing. How can the customer take advantage of volume discounts with minimal impact to the AWS resources?

A) Create one global AWS acount and move all AWS resources to tha account.
B) Sign up for three years of Reserved Instance pricing up front.
C) Use the consolidated billing feature from AWS Organizations.
D) Sign up for the AWS Enterprise support plan to get volume discounts.