Answer:
(D) Auditory sensations elicited visual sensations.
Step-by-step explanation:
Synaesthesia can be defined as a neurological trait disorder that results in a joining or merging of senses that aren't normally connected( e.g earing and visual organs). The stimulation of one sense causes an involuntary reaction in one or more of the other senses. Synaesthesia means irregular combination of two unrelated senses.For example, someone with synaesthesia may hear colour or see sound instead of seeing color and hearing sound.
The best way that describes the way it was experienced by Cytowic's friend was that Auditory sensations elicited visual sensations.