Professor Rochelle Told Her Students That If Her Door Was

Multiple Choice

Professor Rochelle told her students that if her door was closed it meant that she was unavailable to them and would be angry if they knocked on her door. But if her door was open, it meant that she was in a rare good mood and would answer questions at that time. Professor Rochelle's door being open was a __________ for __________

A) discriminative stimulus; asking questions.
B) discriminative stimulus; not asking questions.
C) discriminative response; asking questions.
D) discriminative response; not asking questions.