tell the teacher about the bottle and liquid. pour the liquid down the drain. compare the liquid to other liquids. find the mass of the bottle and liquid.
I gave my students this multiple choice question: A student in science class finds an unlabeled bottle containing a liquid. For safety purposes the student should

Only one answer is correct among these 4 choices:
- tell the teacher about the bottle and liquid.
- pour the liquid down the drain.
- compare the liquid to other liquids.
- find the mass of the bottle and liquid.

Could you tell me which one is correct?

tell the teacher about the bottle and liquid.