Which of the following represents the BEST way to handle the waste?

A technician just replaced a network copier’s toner cartridges and wants to dispose of the used ones.

Which of the following represents the BEST way to handle the waste?
A . Refill the cartridges manually and return them to the shelf for the next rotation.
B . Place the used cartridges in the packaging the new ones came in and give them to a specialized recycler.
C . Dispose of the used cartridges in the standard municipal garbage.
D . Bring the used cartridges to the local recycling plant and place them in the bin marked "plastics".

Answer: A