Answer: A,B
Explanation:
Step 1 (B): if required add physical disk capacity.
Step 2 (A): Dynamically extend the virtual disk (not volume).
The File and Storage Services role and the Storage Services role service are installed by default, but without any additional role services. This basic functionality enables you to use Server Manager or Windows PowerShell to manage the storage functionality of your servers.
Windows Server 2012 Storage Space subsystem now virtualizes storage by abstracting multiple physical disks into a logical construct with specified capacity.
The process is to group selected physical disks into a container, the so-called storage pool, such that the total capacity collectively presented by those associated physical disks can appear and become manageable as a single and seemingly continuous space.
Subsequently storage administrator creates a virtual disk based on a storage pool, configure a storage layout which is essentially a RAID level, and expose the storage of the virtual disk as a drive letter or a mapped folder in Windows Explorer.
The system administrator uses File and Storage Services in Server Manager or the Disk Management tool tore scan the disk, bring the disk online, and extend the disk size.