The reaction described above is called an Unconditioned Response.
This is more like a reaction or response that is unlearned in the presence of an unconditioned stimulus.
An example of an unconditioned stimulus is when one begins to feel thirsty as soon as they see their favorite drink.
The thirst is an example of an unconditioned stimulus. The correct answer thus is C.
See the link below for more about Unconditioned Response
https://brainly.com/question/1462220