helmet shells rubber bands plumbing pipes drinking cups
I gave my students this multiple choice question: Some molecules used to manufacture plastic objects are long and tangled. They straighten when force is applied to them and then return to their shorter, tangled shape. Which common object is most likely made using such molecules?

Only one answer is correct among these 4 choices:
- helmet shells
- rubber bands
- plumbing pipes
- drinking cups

Could you tell me which one is correct?

rubber bands