Professor Elliot Told His Students That If His Door Was

Multiple Choice

Professor Elliot told his students that if his door was open,it meant that he was available to them and would gladly answer any questions they might have.But if his door was pushed almost completely shut,it meant that he was busy and would prefer not to answer questions at that time.Professor Elliot's door being open was __________ for __________.

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