Answer: CS(Conditioned Stimulus )
Explanation:
Conditioned stimulus is the factor that was at neutral state at previous time but after getting connected with unconditioned stimulus it produces a trigger in the form of conditioned response.
According to the question, door closing is conditioned stimulus because door gets combined with the closing action done by Dr. Meyer which generates a trigger that indicates students about pop quiz.
Jaroslaw Kaczynski is the former Prime Minister of Poland.
He is also a <span>conservative politician and lawyer.
Good Luck! :)</span>
2 years, 4 months, and 10 days.