Why might administrators prefer to install Windows Server 2012 R2 using the Server Core option?

Choosing to install Windows Server 2012 R2 using the Server Core option is often preferred by administrators for several reasons related to resource efficiency, security, and administrative effectiveness.

The option indicating that a Server Core installation can be converted to the full GUI without reinstalling is correct because it allows flexibility in deployment. Administrators may begin with a Server Core installation to benefit from its lighter footprint and reduced resource consumption, which is particularly advantageous for managing a large number of servers or in environments where performance is critical. Should the need for a graphical interface arise later, administrators can simply use a built-in command to add the GUI without the hassle of starting from scratch.

In contrast to the other options, the inability to convert a Server Core back to a full GUI, the misconception about it consuming more resources, and the claim that remote administration is not possible are not valid points that align with the benefits of Server Core installations. Generally, Server Core installations are recognized for their lower resource demands and enhanced security profile due to having a smaller attack surface. Remote administration is also entirely feasible through various methods like Windows PowerShell or Remote Server Administration Tools (RSAT), making Server Core a practical choice for many administrators.