You are designing a strategy to ensure that DNS queries always take the most efficient route to get resolved.  Which action or actions should you perform？（）

• A、 Configure conditional forwarding on the corporate DNS servers to point the development DNS servers.
• B、 Configure conditional forwarding on the development DNS servers to point the corporate DNS servers.
• C、 Configure conditional forwarding on the perimeter network DNS servers to point the corporate and development DNS servers.
• D、 Configure forwarding on the corporate and development DNS servers to point the perimeter network DNS servers.
• E、 Disable root hints on the perimeter network DNS Servers.