Which of the following pictures correctly show the way sound vibrations travel?

Answer is C.

Sound (in air) is made when air molecules vibrate and move (away from the vibrating source) in a pattern called waves, or sound waves. Sound is a mechanical, longitudinal wave (that moves in all directions) and travels in waves of compressions and rarefactions (expansion) as it successively passes through a medium.
They travel outwards in all directions in waves from a sound source. As they travel outwards the energy they contain becomes dissipated and therefore the sound becomes weaker the further it is from the source. The shape of a sound wave with no obstacles in its way would be approximately spherical.
Hence, sound travels in all directions.