the color of the object the mass of the object how fast the object sinks in water the material that the object is made of
I gave my students this multiple choice question: Which property of an object determines how well it conducts electricity?

Only one answer is correct among these 4 choices:
- the color of the object
- the mass of the object
- how fast the object sinks in water
- the material that the object is made of

Could you tell me which one is correct?

the material that the object is made of