When a Planet Moves Closer to the Sun in an Elliptical

Multiple Choice

When a planet moves closer to the Sun in an elliptical orbit, its rotational inertia

A) does not change because the mass of the planet is constant.
B) gets smaller because its distance from the Sun is smaller.
C) gets smaller because the lever arm is shorter.
D) gets larger because the angular momentum must be conserved.
E) gets larger because the planet has more angular acceleration.