A survey company stores several years of U.S. data in an Amazon S3 bucket that is 3 TB and growing. The company is sharing the data with a European marketing firm that has S3 buckets. The company wants to keep its data transfer costs as low as possible. Which solution will meet this requirement?

The correct solution is to configure the Requester Pays feature on the company's S3 bucket. This feature shifts the cost of data transfer and requests from the bucket owner (the survey company) to the requester (the marketing firm). Since the marketing firm is accessing the data, they will incur the data transfer costs, fulfilling the requirement to keep the survey company's costs low. S3 Cross-Region Replication would duplicate the data, incurring storage and replication costs for the survey company, and the marketing firm would still need to access their replicated bucket, potentially incurring egress costs if it's in a different region. Cross-account access would allow the marketing firm to access the data, but the survey company would still bear the data transfer costs. S3 Intelligent-Tiering optimizes storage costs but does not address data transfer costs for external access; syncing the bucket would also incur costs for the survey company.