Identify the three main CST principles used in this method.

• A. Teach, Train, Proof
• B. Observe, Practice, Validate
• C. Command, Control, Compliance
• D. Reward, Punish, Test

Answer: (A)

The CST approach is built on three phases that together create reliable performance: Teach, Train, Proof. First, Teach introduces the exact behavior or response you want from the dog, using clear cues and demonstrations so the dog understands what is expected. Next, Train has the dog practice the behavior repeatedly with reinforcement, gradually increasing difficulty and criteria to solidify the skill. Finally, Proof tests the behavior in varied settings and with different distractions to ensure the response remains dependable outside the training environment. This Proof step is what ensures the skill generalizes to real-world conditions, which is essential for field work. The other options miss one or more of these essential elements—the initial understanding, the rigorous practice, or the generalization under real conditions—so Teach, Train, Proof best captures how this method works.