Which of the following best represents the process of acquiring a conditioned response in classical conditioning?

• A. A dog rolls over to receive a treat after being shown how by its owner
• B. A dog begins to salivate when it hears a whistle that has been sounded every time before it is fed
• C. A dog hides under the bed after being scolded for chewing shoes
• D. A dog learns to fetch a ball for praise from its owner

Answer: (B)