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.