Your company purchases 15 new 64-bit servers as follows： èFive of the servers have a single processor. èFive of the servers have a single dual core processor. èFive of the servers have two quad core processors. You plan to deploy Windows Server 2008 R2 on the new servers by using Windows Deployment Services （WDS）. You need to recommend a WDS install image strategy that meets the following requirements： Minimizes the number of install images Supports the deployment of Windows Server 2008 R2 What should you recommend？（）

A. one install image file that contains three install images
B. one install image file that contains a single install image
C. two install image files that each contain a single install image
D. three install image files that each contain a single install image