At the Level of the Receptors, How Does the Plasticity

At the level of the receptors, how does the plasticity of the auditory system compare with that of the chemical senses?

A) The auditory system is just as plastic as the chemical senses are.
B) The auditory system is less plastic than the chemical senses are.
C) The auditory system is somewhat more plastic than the chemical senses are.
D) The auditory system is much more plastic than the chemical senses are.