Which of the following activities BEST describes proprioceptive neuromuscular facilitation? A. The stretch involves using an external object to increase muscle strength. B. The stretch involves using a partner to apply force against your contraction. C. The stretch involves bouncing to extend beyond the normal range of motion. D. The stretch involves performing slow, deliberate motions to reduce muscle tightness. Please select the best answer from the choices provided. A B C D.