The best argument that supports the person's statement about the gravitational force depending on the mass of the objects and the distance between them is:
"If the distance between two objects increases, the gravitational force between the objects will decrease."
This statement aligns with the universal law of gravitation, which states that gravitational force is inversely proportional to the square of the distance between the centers of two objects. Thus, as the distance increases, the gravitational force decreases, supporting the person's assertion that the distance affects the gravitational force between objects.