A Company Has Deployed an API in a VPC Behind

A company has deployed an API in a VPC behind an internet-facing Application Load Balancer (ALB) . An application that consumes the API as a client is deployed in a second account in private subnets behind a NAT gateway. When requests to the client application increase, the NAT gateway costs are higher than expected. A solutions architect has configured the ALB to be internal. Which combination of architectural changes will reduce the NAT gateway costs? (Choose two.)

A) Configure a VPC peering connection between the two VPCs. Access the API using the private address.
B) Configure an AWS Direct Connect connection between the two VPCs. Access the API using the private address.
C) Configure a ClassicLink connection for the API into the client VPC. Access the API using the ClassicLink address.
D) Configure a PrivateLink connection for the API into the client VPC. Access the API using the PrivateLink address.
E) Configure an AWS Resource Access Manager connection between the two accounts. Access the API using the private address.