Michelle Kwan, the American Figure Skater, Is Spinning on Ice

Michelle Kwan, the American figure skater, is spinning on ice with her arms extended. She then draws her arms in and crosses them in front of her chest. How has her moment of inertia changed?

A) Her moment of inertia has decreased.
B) Her moment of inertia has increased.
C) Her moment of inertia has not changed.
D) Her moment of inertia decreases as she draws her arms in, but then returns to the initial value once she has crossed them.
E) Her moment of inertia increases as she draws her arms in, but then returns to the initial value once she has crossed them.