A company that provides a RESTful API is designing a network architecture for deployment to the AWS Cloud. The company needs a scalable design that is cost-optimized and secure. The company is conducting pre-release testing with some of its customers, but the company expects to expand to several hundred customers when the final version is released.
The data that is exchanged through the API is confidential. All data must be exchanged on private IP addresses that are not accessible through the internet. All customers who use the API operate on AWS in VPCs.
What should the company do with its architecture to meet these requirements?

A. Use a Network Load Balancer (NLB) as the front end to the API. Use a transit VPC with VPC peering to each customer's VPC.
B. Use AWS PrivateLink endpoints in customer VPCs as the front end for an AWS Fargate containers deployment with auto scaling enabled.
C. Use an Amazon API Gateway API with a regional API endpoint as the front end for all API interactions that invoke AWS Lambda functions.
D. Use an Amazon API Gateway API with an edge-optimized API endpoint as the front end for all API interactions that invoke AWS Lambda functions.