What could have caused the operating system to crash?

A technician is working on an operational PowerEdge R640 server that cannot be rebooted. Observing that all drives are hot-swappable devices, the technician decides to remove a drive that has been giving intermittent errors. After the single drive is removed the operating system crashes.

What could have caused the operating system to crash?
A . System Lockdown mode was enabled, which does not allow any component to be hot-swapped
B . iDRAC was not configured for hot-swappable components
C . Drive was part of a RAID 0 virtual disk
D . PERC was configured to allow a single drive removal

Answer: C