How fast does a toy car usually roll? What is the best way to make a toy car roll? Which surface allows a toy car to roll farther? Does color have an effect on the distance a toy car rolls?
I gave my students this multiple choice question: A student gives a red toy car a push on a wooden floor. The student then pushes the same red toy car on a cement floor. Which question is the student most likely investigating?

Only one answer is correct among these 4 choices:
- How fast does a toy car usually roll?
- What is the best way to make a toy car roll?
- Which surface allows a toy car to roll farther?
- Does color have an effect on the distance a toy car rolls?

Could you tell me which one is correct?

Which surface allows a toy car to roll farther?