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.