In the context of the philosophical and comparative study of Edward Thorndike's 'Trial and Error Theory' and B.F. Skinner's 'Operant Conditioning', which of the following statements most accurately explains the fundamental and scientific difference between these two theories?

In Thorndike's 'Trial and Error Theory', the stimulus is present beforehand and the organism attempts to reach or respond to it (S-R Theory). Conversely, in Skinner's 'Operant Conditioning', the organism emits a response independently, and the subsequent consequence or reinforcement determines the likelihood of that behavior recurring (R-S Theory).