This Classical Conditioning Experiment Includes a Light and a Tone,which

Multiple Choice

This classical conditioning experiment includes a light and a tone,which we can call CS1 and CS2.First the animal repeatedly gets CS1 followed by the UCS.Then it gets both CS1 and CS2 followed by the UCS.Which stimulus or stimuli will now evoke a strong CR?​

A) Both CS1 and CS2, equally
B) CS1 only​
C) CS2 only​
D) Neither CS1 nor CS2​