A flower shop has preferred supplier arrangements with an answering service, to take orders after hours, and a bicycle delivery service, to ensure that it can make deliveries quickly, reliably, and at a reasonable cost. Which of the following statements is most accurate for the flower shop?

A. The answering service is part of its supply chain.

B. The bicycle delivery service is part of its value chain.

C. The bicycle delivery service is part of its supply chain.

D. The bicycle delivery service is not a part of the value proposition for the flower shop.