Which of the comments below should you make?

Supercar is an online vehicle sales website specialising in a single manufacturer’s Sports Utility Vehicles (SUVs) and saloons. A vehicle has two key elements, power unit and body style. The manufacturer offers three choices of power unit: petrol, diesel and hybrid. There are 3 mam body styles Saloon, Hatchback and SUV SUVs only come as petrol and diesel options Hybrid is available for Hatchback only. The site will allow an order to be processed if at least one of the chosen vehicle configurations is in stock, otherwise a message will be displayed asking the user to try again later As a Test Analyst you are asked to review the Supercar specification before starting to design the corresponding usability test cases.

Which of the comments below should you make?
A . I have no comments, specification looks OK
B . Boundaries for stock levels are ambiguous.
C . Dependencies between power unit and body style are ambiguous
D . It is not clear which message will be displayed when the car is "out of stock"

Answer: D