Which statement is true regarding moment arm?
A. For torque to remain constant, more force must be produced when moment arm decreases.
B. Changes in moment arm directly affect joint muscle torque.
C. Moment arm is largest when the angle of pull on a bone is 90°.
D. Both moment arm is largest when the angle of pull on a bone is 90° and changes in moment arm directly affect joint muscle torque.
E. All of these answers are correct.
Answer: E
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