Imagine that you flinch after seeing lightning because in previous instances the lightning is followed by thunder, which scared you. In this scenario, lightning can be interpreted as being a(n):

A. unconditioned stimulus
B. unconditioned response
C. conditioned stimulus
D. conditioned response

conditioned stimulus ( C )

Explanation:

A conditioned stimulus is a previously neutral/unconditional stimulus that has been learned by a person or something and the person responds to in a certain way anytime is occurs .

while an unconditional stimulus occurs naturally and triggers a person to respond spontaneously without learning the stimulus previously.

so when you finch after seeing lightning every time you see the lighting is a certain way of response because you have learnt overtime that the lightning is usually followed by a thunder.  

if you have ask any question and if you have got the answer reply for your position there will be option for making a brain least answer you need to click click there and they can get the points in brain list main thing is that you need to choose those answer which answer you are you think that it is to you