Upon a deep analysis of the philosophical and structural dynamics of Edward Thorndike's 'Connectionism', Ivan Pavlov's 'Classical Conditioning', and B.F. Skinner's 'Operant Conditioning' under the psychology of learning, which of the following statements is most authentic and scientifically true regarding the operational mechanism of Stimulus, Response, and Reinforcement in these three behaviorist theories?

Edward Thorndike's Connectionism is based on the Stimulus-Response (S-R) bond in which the Law of Effect is primary. Ivan Pavlov's Classical Conditioning establishes an association between unconditioned and conditioned stimuli (UCS-CS), which is mainly related to involuntary responses. In contrast, B.F. Skinner's Operant Conditioning operates on the Response-Stimulus (R-S) paradigm where the organism acts voluntarily and the resulting reinforcement controls the behavior.