Marvin Creates a Television Ad That Alternates Between Images of Coffins

Multiple Choice

Marvin creates a television ad that alternates between images of coffins and people buying cigarettes.He is hoping that people who watch the ad will develop negative feelings toward buying cigarettes after seeing these ads.What is the conditioned stimulus in Marvin's ad

A)  feelings people have toward cigarettes before they see the ad 
B)  images of coffins 
C)  images of people buying cigarettes 
D)  people's feelings of disgust when viewing coffins