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.