How can the solutions architect meet this requirement?
Deploy Amazon API Gateway into a public subnet and adjust the route table to route S3 calls through it.
Deploy a NAT gateway into a public subnet and attach an endpoint policy that allows access to the S3 buckets.
Deploy the application into a public subnet and allow it to route through an internet gateway to access the S3 buckets.
Deploy an S3 VPC gateway endpoint into the VPC and attach an endpoint policy that allows access to the S3 buckets.
Explanations:
API Gateway is not required to access S3 within the same region. It also does not reduce data transfer costs, as it is intended for creating and managing APIs.
NAT gateway is used for internet access from private subnets, which incurs additional data transfer costs. It is not necessary to access S3 within the same region.
Routing through an internet gateway for S3 access incurs data transfer fees. Accessing S3 from within a VPC does not require internet access in the same region.
An S3 VPC gateway endpoint enables private access to S3 without data transfer costs within the same region. This is the optimal solution to reduce costs.
As far as I’m aware, the answer is:
Deploy an S3 VPC gateway endpoint into the VPC and attach an endpoint policy that allows access to the S3 buckets.