Question

​cassandra, who has been clean and sober for many years after struggling with alcoholism, no longer has a physical addiction to alcohol. however, whenever she sees her old "drinking buddies," she begins to have cravings for alcohol. cassandra's experience is an example of

Answer 1

Cassandra's experience is an example of:  classical conditioning
 classical conditioning refers to the association fo a certain stimulus with a certain Elicited response. 
In the example above, her drinking buddies serve as the 'stimulus' that create the tendency to consume alcohol as the response.