Your company named Contoso， Ltd. has a two-node Network Load Balancing cluster. The cluster is intended to provide high availability and load balancing for only the intranet Web site. The name of the cluster is web.contoso.com.  You discover that Contoso users can see the Network Load Balancing cluster in the network neighborhood and can connect to various services by using the web.contoso.com name. The web.contoso.com Network Load Balancing cluster is configured with only one port rule.  You need to configure the web.contoso.com Network Load Balancing cluster to accept only HTTP traffic. Which two actions should you perform？（）

• A、Log on to one of the cluster nodes and run the wlbs disable all command.
• B、Open the Network Load Balancing Clusters console and delete the default port rules.
• C、Open the Network Load Balancing Clusters console and create a new Allow rule for TCP port 80.
• D、Open the Network Load Balancing Clusters console and change the default port rule to a disabled port range rule.