You are designing the GCP Resource Hierarchy for a large enterprise. The company has three distinct business units (Retail, Wholesale, Logistics). Each business unit has its own IT team and requires strict isolation. Within each business unit, they have Development, Staging, and Production environments. How should you structure the Folders and Projects?

Create top-level Folders for Dev, Staging, and Prod. Inside each environment Folder, create Folders for the Business Units. Place Projects inside the BU Folders.

Create top-level Folders for each Business Unit. Inside each BU Folder, create Folders for Dev, Staging, and Prod. Place the respective Projects inside the environment Folders.

Do not use Folders. Create a single Project for each Business Unit and use VPC networks to separate Dev, Staging, and Prod.

Create a separate GCP Organization for each Business Unit.