Which of the following is true about sound energy?

Question

A. Sound energy causes particles to move in a circular pattern; the denser the object then the more particles the energy will make contact with.

B. Sound requires a medium to travel through; it disturbs particles causing them to push against other particles, allowing the sound energy to move through the medium. The closer those particles are, the faster it will move

C. Sound energy works more efficiently when the particles are distantly spaced, allowing for more movement of the energy and allowing the energy to gain a terminal velocity before contacting another particle.  

Answer 1

I like answer B the most. If vibrations take place in a vacuum, you cannot hear the sound because of lack of medium (air particles). Sound travels better through water than through air, and better through a steel rod than through a wood ruler. B is the correct answer.