Concept:Refraction, interference, and diffraction are general behaviours exhibited by all types of waves.Explanation:Refraction is the bending of a wave when it moves from one medium to another.Interference occurs when two or more waves overlap and combine.Diffraction is the spreading out of waves as they pass through a gap or around an obstacle.All three properties apply to mechanical waves and electromagnetic waves alike.Therefore, every option listed is common to all waves.Answer:B. I, II and III