decreasing the mass of one object decreasing the mass of both objects moving the objects to one meter apart moving the objects to three meters apart
I gave my students this multiple choice question: If two objects are two meters apart, which of these changes will increase the gravitational force between the two objects?

Only one answer is correct among these 4 choices:
- decreasing the mass of one object
- decreasing the mass of both objects
- moving the objects to one meter apart
- moving the objects to three meters apart

Could you tell me which one is correct?

moving the objects to one meter apart