4) Kepler's third law, p2 = a3, means that
A) the period of a planet does not depend on its mass.
B) all orbits with the same semimajor axis have the same period.
C) planets that are farther from the Sun move at slower average speeds than nearer planets.
D) a planet's period does not depend on the eccentricity of its orbit.
E) All of the above are correct.