单项选择题 You have a server named Server1 that runs Windows Server 2012 R2. You try to install the Microsoft .NET Framework 3.5 Features feature on Server1, but the installation fails repeatedly. You need to ensure that the feature can be installed on Server1. What should you do?（）

单项选择题 You have a server named Server1 that runs Windows Server 2012 R2. You need to remove Windows Explorer, Windows Internet Explorer, and all related components and files from Server1. What should you run on Server1?（）

单项选择题 Your network contains two servers named Server1 and Server2 that run Windows Server 2012 R2. Server1 is a DHCP server that is configured to have a scope named Scope1. Server2 is configured to obtain an IP address automatically. In Scope1, you create a reservation named Res_Server2 for Server2. A technician replaces the network adapter on Server2. You need to ensure that Server2 can obtain the same IP address. What should you modify on Server1?（）