Sally went on a run in the woods and then came across a path of rocks, so she decided to walk instead of run. While she was walking, her left foot got caught between two large rocks. Being trapped elicited a fear response. As she struggled to free her foot, she saw a stream of water. The sound of the running water became linked in her mind to the terrifying battle with the rocks, and she developed a fear of running water. What is the conditioned stimulus?
a. The rocks
b. The water
c. Entrapment
d. Fear