A Person Sits on a Freely Spinning Lab Stool That

Multiple Choice

A person sits on a freely spinning lab stool that has no friction in its axle.When this person extends her arms,

A) her moment of inertia decreases and her angular speed increases.
B) her moment of inertia decreases and her angular speed decreases.
C) her moment of inertia increases and her angular speed increases.
D) her moment of inertia increases and her angular speed decreases.
E) her moment of inertia increases and her angular speed remains the same.