What is the difference between the SD in instrumental conditioning and the CS in classical conditioning?

What is the difference between the SD in instrumental conditioning and the CS in classical conditioning?




A)
The SD is a cue that indicates that a contingency is not valid and the CS is a cue that indicates a contingency is valid.
B)
The SD is a cue that indicates a contingency is valid, and the CS itself elicits a conditioned response.
C)
The SD is a cue that indicates a contingency is valid and the CS is a cue that indicates the occurrence of an associated US.
D)
The SD is a cue that elicits the performance or prevention of a behavior and the CS is a cue that elicits the oncoming of a conditioned stimulus.



Answer: B