When Mr Earlgray Sits on a Needle, He Instinctively Screams and and Then

Multiple Choice

When Mr. Earlgray sits on a needle, he instinctively screams and then accidentally knocks over his cup of tea. He then claims that he will never drink tea again, because he finds the act too painful. In this situation, which provides the best example of an unconditioned stimulus?

A) His scream
B) Knocking over the cup
C) The needle
D) His decision to not drink tea