Imagine the door to a theatre is opened and you are standing outside. How is it possible that you can hear the sound of the movie or play even if you cannot see the screen or stage ?

Areflection only happens with sound waves not waves of light so the sound waves bounce out to your ears.

Bthe sound waves refract as they move from one medium to another

Cthe darkness in the theatre absorbed light but not sound so you can hear

Dthe sound waves diffract much more than the light waves so try bend and spread as they move through the doorway.