About the property of waves?

Question

Since we can hear sounds around the corner of a hallway, we know that sound waves can move in ways that permit you to hear sounds that are not in a direct pathway from the source to your ears, What property of waves allows this?
A.reflection
B.refraction
C.diffraction
D.echolation

Answer 1

reflection--bouncing off a surface
refraction--bending at a surface where the speed of the wave changes
diffraction--bending around corners
echolocation--SONAR--like subs, dolphins, and bats

Answer 2

C. diffraction - spreading out of waves

Answer 3

C. diffraction