Alexis uses cocaine, which activates her sympathetic nervous system. expecting her dealer, her hands shake and her heart pounds when she hears a knock on the door. which alternative below correctly identifies the neutral stimulus, the cs, and the ucs?

I believe the answer is: . neutral stimulus—knock on the door; CS—knock on the door; US—cocaine
The neutral stimulus produces no response other than grabbing the attention Conditioned stimulus is the one that triggered a conditioned response (such as walking to open the door) , and unconditioned stimulus is the one that triggered unconditional response. (such as pain relief after using cocaine)