Professor Woster brings his participants into the laboratory, attaches electrodes and sensors to them, and has them play a computer game. One group of participants hears six loud bursts of noise at random intervals. The second group hears the same bursts of noise also at random intervals but just before each burst occurs a bluebird flies across the computer screen. Professor Woster is using the paradigm to study the effect of noise on physiological responses. A. disease induction B. acute stress C. stressful life events D. daily stress