Clara and Ashley Ate Dinner at a New Restaurant Last

Multiple Choice

Clara and Ashley ate dinner at a new restaurant last night.The entire restaurant was decorated in green,and the sound of waterfalls played in the background.Both Clara and Ashley ordered "trapper casserole," which tasted like nothing they had ever eaten before.Four hours after they had eaten,they both started vomiting violently and were taken to the hospital by ambulance,with the sirens wailing.What is most likely to elicit conditioned responses from Clara and Ashley,based on research conducted by Garcia and his colleagues

A)  anything that is coloured green 
B)  foods that smell like trapper casserole 
C)  the sound of sirens 
D)  the sound of falling water