Which two reasons are probable causes of the failure?

An administrator is attempting to power on a virtual machine, but is unable to do so.
Which two reasons are probable causes of the failure? (Choose two.)
A. Storage access to the virtual machine swap file has been lost.
B. One of the virtual machine VMDK files is locked.
C. Virtual machine is running CentOS 7.0 64-bit.
D. Virtual machine has Hyper-Threading enabled.