What caution should a technician be aware of before attempting to remove hard drives or

optical drive carrier from a MacPro (Mid 2012)?

A.
The rear latch must be lifted or the drives are locked in a place.

B.
The optical drive screws must be removed before sliding the carrier out of enclosure.

C.
The hard drives must be unscrewed from the carrier before removal.

D.
The rear latch should be in the closed position to unlock drives.