While Sitting in Her Jeep at a Red Traffic Light

Multiple Choice

While sitting in her Jeep at a red traffic light, Lauren heard a loud screech. One second later, a cab smashed into the back of her Jeep. Now when she hears a screeching sound, she feels anxious. In this example, the screech became an effective __________, and her anxiety in response to the sound became the __________.

A) CR; CS
B) US; CR
C) CS; CR
D) CS; UR