What differentiates extension from hyperextension? A. Extension bends joints in the opposite direction as hyperextension. B. Extension straightens a joint, and hyperextension bends it but in the opposite direction from flexion. C. Hyperextension straightens a joint, and extension bends it in the opposite direction from flexion. D. Both bend joints, but extension can be damaging. Please select the best answer from the choices provided. A B C D