Which of the Following Statements About Throwing Are True

Which of the following statements about throwing are true.

A) The follow-through predominately involves concentric muscle activity.
B) The preparation phase increases the length of the pulling path allowing a greater impulse to be created.
C) Elbow extension in the late pulling phase depends upon substantial muscular activity.
D) Flexion at the elbow increases the moment of inertia about the shoulder supporting the generation of a greater degree of external rotation.