Based on a meticulous analysis of the theoretical and experimental dynamics of concepts such as 'Unconditioned Stimulus', 'Unconditioned Response', 'Conditioned Stimulus', and 'Extinction' under the 'Classical Conditioning Theory' propounded by Ivan Pavlov, which of the following statements is most authentic and scientifically true in the context of this theory?

Detailed Explanation of Classical Conditioning and Extinction

According to Ivan Pavlov's Classical Conditioning Theory, when a natural or unconditioned stimulus (such as food) is repeatedly paired with an artificial stimulus (such as the sound of a bell), the organism begins to exhibit the same response (salivation) to the artificial stimulus as well.

However, if the conditioned stimulus (bell) is presented repeatedly without the unconditioned stimulus (food) following the conditioning phase, the conditioned response gradually weakens and eventually ceases to occur. This phenomenon is scientifically termed as 'Extinction'.

• Unconditioned Stimulus (US): A stimulus that unconditionally, naturally, and automatically triggers a response (e.g., food).
• Conditioned Stimulus (CS): A previously neutral stimulus that, after becoming associated with the unconditioned stimulus, eventually comes to trigger a conditioned response (e.g., bell sound).
• Extinction: The gradual weakening and disappearance of the conditioned response when the conditioned stimulus is repeatedly presented without the unconditioned stimulus.