Question

Best answer gets BRAINLIEST!

Answer 1

1. The speed of sound in a vacuum is zero meters per second, as there are no particles present in the vacuum and medium C must be vacuum hence the observation.
2. Since the speed of sound is maximum in medium A, it must be a solid because the speed of sound travels fastest in a solid.
3. Medium B ( as the average is 343 m/s and Medium B is closest to it).

HOPE IT HELPS. MARK AS BRAINLIEST.