Which AWS regions fall under the management of the US East control plane?

The US East control plane is primarily responsible for managing resources and services within the AWS regions located in the United States and parts of South America. The inclusion of US East and US West aligns with the geographical coverage established by AWS for management purposes. It implies that these regions operate under the same control plane, ensuring consistent management protocols, service availability, and compliance directives within that specific locale.

This organization allows AWS to maintain efficiency and coherence in managing resources, optimizing data transfer, and adhering to regulatory requirements across regions that report to the same control plane. In the context of the provided choices, South America falls within the broader purview of regions managed from the US East control plane, confirming that the answer encompasses regions that align regionally and operationally under this management umbrella.