A VPC was created successfully from a CloudFormation template. You need to deploy the same CloudFormation template into many member accounts that are managed under a single AWS Organizations management account. Which method will accomplish this with the least operational effort?

AWS CloudFormation StackSets is the most efficient solution for deploying the same CloudFormation template across multiple AWS accounts within an AWS Organizations setup. StackSets allows you to create, update, or delete stacks across multiple accounts and Regions with a single operation from a central administrator account. This significantly reduces operational overhead compared to manually deploying in each account or writing custom scripts. Manually assuming roles and deploying in each account is time-consuming and error-prone. While a Lambda function could automate this, StackSets provides a managed service specifically designed for this use case, offering built-in features for concurrency, failure tolerance, and drift detection, making it a more robust and less operationally intensive choice.