Answer:
Option (C)
Step-by-step explanation:
A sound is usually defined as a wave that is characterized by the presence of a certain wavelength, amplitude, speed, time-period and frequency.
It can travel in all the medium such as solid (in the oceanfloor), liquid (water) and gas (air). The velocity of the sound differs from medium to medium.
Sounds cannot travel through a vaccum and a close approximation of vaccum is space. It is because there is no solid, liquid or gas in space, through which sound could travel.
Thus, the correct answer is option (C).