The best method for protecting your hearing if you work in a theater that has frequent concerts would be to
A tell your boss you can only work the box office because it is not noisy there.
B refuse to work rock concerts since they are the ones that play loud music.
C walk with your hands over your ears when you have to seat people in the theater.
D wear earplugs in your ears that will still allow you to hear, but will reduce the noise level a lot.