What is the MOST operationally efficient configuration to meet these requirements?
Add the VPC to the resource share. Add the account IDs as principals
Add all subnets within the VPC to the resource share. Add the account IDs as principals
Add all subnets within the VPC to the resource share. Add the organization as a principal
Add the VPC to the resource share. Add the organization as a principal
Explanations:
Adding only the VPC to the resource share would not expose individual subnets to the target accounts, preventing the database instances from launching in specific shared subnets.
Adding subnets and account IDs individually is not scalable as the number of accounts grows. This setup would require continuous manual updates to add new accounts.
Sharing subnets with the organization allows all current and future member accounts to use the specified subnets without individual account updates, achieving operational efficiency.
Sharing the VPC only would not grant access to specific subnets, which is needed for the database instances to meet the company policy.