Which three of the following statements regarding storage requirements are true?

A. Keys must be stored in the C2 safe in a clearly marked vial when not in use.
B. Once in use, liners must be stored within the kiosk until the liner is transferred to the common carrier.
C. Unused liners must always be stored inside the pharmacy until the liner is installed into the kiosk.
D. Sealed liners may be stored in the pharmacy while awaiting common carrier pick-up.
E. Unused liners may be stored in the backroom if there are space constraints in the pharmacy.