Which of the Following Statements Is True of Isokinetic Exercises

Which of the following statements is true of isokinetic exercises?

A) In isokinetic exercises, the muscle is shortened and lengthened through a complete range of motion.
B) In isokinetic exercises, resistance is given at a fixed velocity of movement with accommodating resistance.
C) Isokinetic exercises have been widely used as a training and conditioning technique and have also gained popularity as a rehabilitation tool.
D) The key to isokinetic exercise is the resistance rather than the speed at which resistance can be moved.