On Tuesday Morning,Chloe Prepared Her Typical Breakfast of Cereal with Milk,fruit,and

On Tuesday morning,Chloe prepared her typical breakfast of cereal with milk,fruit,and black coffee.However,instead of having grapefruit with her breakfast as she normally does,she tried eating mango for the first time.Later she became extremely ill.If her illness causes her to develop a conditioned response to one of her breakfast items,which food will elicit the conditioned response

A)  grapefruit, because that was the one thing missing from her typical breakfast 
B)  mango, because it was a novel stimulus 
C)  coffee, because coffee is a stimulant 
D)  milk, because the milk may have been sour