Khalila decided to try a new dish consisting of rice and tomatoes just as she was coming down with the flu. Now, every time she sees rice or tomatoes, she gets sick to her stomach. In this example, Khalila's experience of nausea at the sight of rice or tomatoes exhibits a(n)

• A. unconditioned stimulus.
• B. unconditioned response.
• C. conditioned stimulus.
• D. conditioned response.

Answer: (D)

Verified step by step guidance

1. Identify the key elements in the scenario: Khalila's experience with rice and tomatoes, and her subsequent nausea.
2. Understand the concept of classical conditioning, which involves learning through association.
3. Recognize that the flu, which caused the initial nausea, is the unconditioned stimulus (US) because it naturally causes a response.
4. Note that the nausea Khalila felt when she first ate the dish is the unconditioned response (UR) because it was a natural reaction to the flu.
5. Realize that the sight of rice or tomatoes has become a conditioned stimulus (CS) because it now triggers the nausea, which is the conditioned response (CR), even in the absence of the flu.