A conditioned response may be extinguished when
similar stimuli cause the same response.
O the conditioned response is no longer paired with an unconditioned response.
O stimuli that are not similar to each other cause a different response.
O a conditioned stimulus is no longer followed by an unconditioned stimulus.

Extinction in classical conditioning occurs when the conditioned stimulus is repeatedly presented without the unconditioned stimulus, leading to the gradual weakening and disappearance of the conditioned response.

Explanation:

Extinction in classical conditioning occurs when the conditioned stimulus (CS) is repeatedly presented without the unconditioned stimulus (US), leading to the gradual weakening and disappearance of the conditioned response (CR). This process involves breaking the association between the CS and the US by presenting the CS alone.

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