You are designing the DNS name resolution strategy for the internal network. What should you do?（）

• A、Configure all internal DNS servers to use the default root hints.
• B、Disable recursion on the DNS server in Seattle. Configure the Seattle DNS to use Dallas DNS server as a forwarder.
• C、Create a root zone on the DNS server in Dallas. Configure the Seattle DNS server to use the Dallas DNS server as a forwarder.
• D、Create a root zone on the DNS server in both Dallas and Seattle.