Which of the Following Statements Is True of Concentric Muscle

Which of the following statements is true of concentric muscle contractions?

A) The force developed by the muscle is less than that of the resistance.
B) Contractions cause movement against gravity or resistance.
C) The body part remains stable against gravity or external forces when concentric muscles contract.
D) Contractions result in the joint angle changing in the opposite direction of the applied muscle force.