A company would like to dispose of old toner units. Which of the following would be the MOST appropriate course of action to take？（）

A.Use an approved recycling program either through a vendor or local government agency.
B.Old toner disposal is the responsibility of the manufacturer. Call the appropriate number at the respective company.
C.Toss the units into the trash. Toner cartridges are biodegradable.
D.Clean out the toner cartridges with warm water and place the clean units into the recycling collection.