正确答案: A, D

Correct answer are A & D as Redshift Enhanced VPC Routing helps access AWS services including S3 through VPC, without having to route any traffic through internet. Also, note the region is the same.,Refer AWS documentation - Redshift Enhanced VPC Routing,When you use Amazon Redshift Enhanced VPC Routing, Amazon Redshift forces all COPY and UNLOAD traffic between your cluster and your data repositories through your Amazon VPC. You can now use standard VPC features, such as VPC security groups, network access control lists (ACLs), VPC endpoints, VPC endpoint policies, Internet gateways, and Domain Name System (DNS) servers, to tightly manage the flow of data between your Amazon Redshift cluster and other resources. When you use Enhanced VPC Routing to route traffic through your VPC, you can also use VPC flow logs to monitor COPY and UNLOAD traffic.,If Enhanced VPC Routing is not enabled, Amazon Redshift routes traffic through the Internet, including traffic to other services within the AWS network.,VPC Endpoints – For traffic to an Amazon S3 bucket in the same region as your cluster, you can create a VPC endpoint to direct traffic directly to the bucket. When you use VPC endpoints, you can attach an endpoint policy to manage access to Amazon S3.,Option B is wrong as Redshift cannot directly access S3 without internet,Option C is wrong as NAT enables connectivity to services via Internet only or other AWS services.,NAT gateway – To connect to an Amazon S3 bucket in another region or to another service within the AWS network, or to access a host instance outside the AWS network, you can configure a network address translation (NAT) gateway.