Your network consists of a single Active Directory domain. The network contains two Windows Server 2008 R2 computers named Server1 and Server2. The company has two identical print devices. You plan to deploy print services.  You need to plan a print services infrastructure to meet the following requirements： èManage the print queue from a central location.    èMake the print services available， even if one of the print devices fails. What should you include in your plan？（）

• A、Install and share a printer on Server1. Enable printer pooling.
• B、Install the Remote Desktop Services server role on both servers.Configure Remote Desktop Connection broker（RD Connection Broker）.
• C、Install and share a printer on Serve1. Install and share a printer on Server2. Use Print Management to install the printers on the client computers.
• D、 Add Server1 and Server2 to a Network Load Balancing cluster. Install a printer on each node of the  cluster.