A company has created three VPCs: a production VPC, a nonproduction VPC, and a shared services VPC. The production VPC and the nonproduction VPC must each have communication with the shared services…

By associating the production and nonproduction VPC attachments with a transit gateway route table where only routes from the shared services VPC are propagated, direct communication between production and nonproduction is prevented while both can reach shared services.

Associating all VPC attachments with a single transit gateway route table and propagating routes from all attachments would allow all VPCs to communicate, violating the requirement to prevent communication between production and nonproduction.

Associating all VPC attachments with a single route table, even if only propagating routes for the shared services VPC, could still allow unintended communication or requires complex manual route management to fully isolate, not achieving the desired segregation simply.

This option is incomplete, making it impossible to fully evaluate; however, the core concept of associating production/nonproduction attachments with a route table that only has shared services routes is correct for the requirement.