Our senses adapt to continuous, repetitive stimulation because this allows us to
a. multitask effectively
b. nothing since our senses do not adapt
c. operate more efficiently
d. relax due to familiarity

c. operate more efficiently

Explanation:

Our senses can adapt to stimulation in such a way that they allows us to operate more efficiently and be more alert to change. By responding to the new stimulation, the brain will create standard responses and behaviors over time that will be our usual way to deal with such a stimulation. If we practice something, eventually, that will become our standard response and we'll have that repeated in a similar occasion. That's how we adapt and get better at things.

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