Which solution provides the LOWEST data transfer egress cost for the company?

Explanations:

Querying the data warehouse over the internet would incur high data transfer egress costs due to the large result set sizes (50 MB per query) and the additional size of the visualization tool’s web pages (500 KB each). The egress charges from AWS to the internet would be significant.

While hosting the visualization tool in the same AWS Region as the data warehouse reduces egress costs compared to option A, accessing it over the internet still incurs data transfer charges. This option does not take advantage of the Direct Connect connection, which could further reduce costs.

Querying the data warehouse over a Direct Connect connection is an improvement, as it provides a private, dedicated connection with lower transfer costs than the internet. However, hosting the visualization tool on-premises still incurs egress costs when transferring data back to the corporate office.

Hosting the visualization tool in the same AWS Region as the data warehouse and accessing it over a Direct Connect connection minimizes data transfer egress costs. This setup leverages the private connection for lower costs and avoids internet egress charges, leading to the overall lowest cost for data transfer.