Which statement about the relationship between prototypes and pilots is most accurate?

Which statement about the relationship between prototypes and pilots is most accurate?

• A. Prototypes are used for market testing only; pilots are for internal testing.
• B. Prototypes and pilots are interchangeable terms.
• C. Prototypes are tested with real customers; pilots test only the concept.
• D. Prototypes test concept; pilots test the product in real-world conditions with actual customers before full rollout.

Answer: (D)