A Big Data consulting company wants to separate its customers’ workloads for billing and security reasons. The company would like to maintain billing and security controls on these workloads.
According to best practices, how can the workloads be separated if no shared resources are needed?

A. Require each customer to create their own account. Contact AWS Support to receive a consolidated bill.
B. Create customer accounts within AWS Organizations specifying consolidated billing features.
C. Create a separate VPC for each customer. Use security groups to isolate traffic.
D. Dedicate an AWS Region to each customer. Ensure that each entry in Amazon Route 53 is unique.