shape color ability to reflect light ability to conduct electricity
I gave my students this multiple choice question: A student reaches one hand into a bag filled with smooth objects. The student feels the objects but does not look into the bag. Which property of the objects can the student most likely identify?

Only one answer is correct among these 4 choices:
- shape
- color
- ability to reflect light
- ability to conduct electricity

Could you tell me which one is correct?

shape