A Merry-Go-Round Spins Freely When Diego Moves Quickly to the Center

Multiple Choice

A merry-go-round spins freely when Diego moves quickly to the center along a radius of the merry-go-round. As he does this, it is true to say that

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