Which of the following is not true of vibrations? a. a non-vibrating object can begin to vibrate as a result of forced vibrations b. two bodies with the same vibration frequency that are placed next to each other will exhibit sympathetic vibrations as one body causes the other to vibrate c. resonance occurs as a result of sympathetic vibrations d. forced vibrations, such as those between a tuning fork and a large cabinet surface, result in much lower sound than was produced by the original vibrating body