Answer to Question 1
ANSWER: b
Answer to Question 2
Two types of amplification systems and cochlear implants are options for those who are having difficulty hearing. The least expensive and most common option are what is called analog hearing aids. However, these provide the lowest quality sound. Digital hearing aids include microchips that can be programmed for different hearing situations. Lastly, there are cochlear implants. These do not amplify sound, but a microphone transmits sounds to a receiver that stimulates auditory nerve fibers. All of these, while helpful options for those experiencing hearing loss, do not perfectly duplicate the experience of normal hearing.