For the Past Three Months,every Time Steve Has Been Out

Multiple Choice

For the past three months,every time Steve has been out at the local bar he takes ecstasy.One evening he attends a house party,ingests ecstasy,and becomes so sick that he needs to go to the hospital.In this case,the local bar acted as a/an______________,preparing his body for the drug.

A) unconditioned stimulus
B) conditioned stimulus
C) unconditioned response
D) conditioned response