A company will migrate data from an Amazon RDS for PostgreSQL DB instance in the eu-east-1 Region of Account_A to an Amazon Redshift cluster in the eu-west-1 Region of Account_B. To allow AWS Database Migration Service (AWS DMS) to replicate between those two data stores, what should the company do?

The AWS DMS replication instance should be set up in the target account (AccountB) and the target region (eu-west-1). This placement minimizes cross-account and cross-region data transfer costs, as the replication instance will be close to the Redshift target. It also simplifies network configuration and security within AccountB. Placing it in AccountB in eu-east-1 would incur cross-region data transfer costs to the Redshift cluster. Setting it up in a new AWS account adds unnecessary complexity. Placing it in AccountA in eu-east-1 would require cross-account and cross-region data transfer, increasing costs and latency.