Answer:
(A). John Garcia's studies on the importance of biological predispositions in conditioning
Step-by-step explanation:
John Garcia carried out studies on the importance of biological predispositions in conditioning and discovered what is called the "conditioned taste aversion" also known as Garcia effect.
According to Garcia, animals develop a survival mechanism after being exposed to poisonous food and as such, learn to avoid such foods in future so they don't get sick.