Answer:
Moving the objects to one meter apart.
Step-by-step explanation:
The gravitational force between tow objects is given by -
Where
G is universal gravitational constant
r is distance between masses
It can be seen that the force will increase if we increase the masses or if we decrease the distance between masses.
Here, two objects are two meters apart. If the distance is decreased, the force will increase.
Here, out of 4 options, when the objects moves to 1 meter, the gravitational force will increase. Hence, the correct option is (c).