Why, according to Newtonian gravity, do objects move as described by Kepler’s Second Law (that objects move faster when closer to the Sun, and slower when farther from the Sun)?
a. As a planet gets closer to the Sun, its inertia causes it to speed up
b. When a planet is closest to the Sun, its mass increase, increasing the force it feels
c. As a planet falls closer to the Sun, the force of attraction increases, speeding up the planet
d. When a planet is farthest from the Sun, the force is greatest, so it moves fastest