The centers of two 15.0 kg spheres are separated by 3.00 m. The magnitude of the gravitational force between the two spheres is approximately what?
A) 1.11 × 10⁻¹⁰ N
B) 3.34 × 10⁻¹⁰ N
C) 1.67 × 10⁻⁹ N
D) 5.00 × 10⁻⁹ N