the object's diameter the object's composition the shape of the object's orbit the speed at which the object travels
I gave my students this multiple choice question: Which information will best help scientists determine if an object is a comet, an asteroid, or a meteoroid?

Only one answer is correct among these 4 choices:
- the object's diameter
- the object's composition
- the shape of the object's orbit
- the speed at which the object travels

Could you tell me which one is correct?

the object's composition