pour it down the drain put it into a garbage can recycle the compound for a future lab activity place it in a hazardous material waste container
I gave my students this multiple choice question: Which of these is the best way to dispose of a potentially dangerous compound?

Only one answer is correct among these 4 choices:
- pour it down the drain
- put it into a garbage can
- recycle the compound for a future lab activity
- place it in a hazardous material waste container

Could you tell me which one is correct?

place it in a hazardous material waste container