Which solution will meet these requirements?

Explanations:

The Requester Pays feature shifts the data transfer costs to the requester, allowing the European marketing firm to bear the cost of accessing the data, which minimizes expenses for the survey company.

S3 Cross-Region Replication would incur ongoing transfer costs for replicating data from the survey company’s S3 bucket to the marketing firm’s bucket, making it more expensive.

Cross-account access enables data access, but the survey company would still incur data transfer costs, which does not address the goal of minimizing these expenses.

S3 Intelligent-Tiering optimizes storage costs but does not address data transfer costs. Syncing the bucket to the marketing firm’s bucket would increase transfer costs.