From the following statements about mechanical waves, identify those that are true for transverse mechanical waves only, those that are true for longitudinal mechanical waves only, and those that are true for both types of waves. A. In longitudinal waves, the particles of the medium move parallel to the direction of the flow of energy. B. Many wave motions in nature are a combination of longitudinal and transverse motion. C. In transverse waves, the particles of the medium move perpendicular to the direction of the flow of energy. D. All of the above