Newton's Law of Universal Gravitation establishes the intensity of the force of attraction between two masses. It is represented by the expression:
$$F = G \frac{m_{1} m_{2}}{d^{2}}$$
where $m_{1}$ and $m_{2}$ correspond to the masses of the bodies, $d$ to the distance between them, $G$ to the universal gravitational constant, and $F$ to the force that one body exerts on the other.
The diagram represents the circular trajectories of five satellites, of equal mass, orbiting the Earth.
Which graph expresses the intensities of the forces that the Earth exerts on each satellite as a function of time?
(A), (B), (C), (D), (E) [as shown in the figures]