You work as a senior administrator at ABC.com. The ABC.com network consists of a single domain named ABC.com. All servers on the ABC.com network have Windows Server 2012 R2 installed. You are running a training exercise for junior administrators. You are currently discussing Storage Spaces.Which of the following is TRUE with regards to Storage Spaces？（）

• A、Mirroring and parity are optional resilient storage modes of Storage Spaces.
• B、Failover clustering is not supported by Storage Spaces.
• C、Storage spaces are virtual disks with associated attributes such as a preferred level of resiliency，and thin or fixed provisioning.
• D、Storage spaces are a collection of physical disks with associated attributes such as a preferred level of resiliency， and thin or fixed provisioning.