As a Cisco Network Engineer, you have to master the knowledge of the Cisco validated Design (CVD) program. Which three of the following descriptions are appropriate about the CVD program?（） (Choose three.)
- A It incorporates a narrow range of technologies and products.
- B It facilitates faster and more reliable customer deployments.
- C It extends the value of designs through a sustained development plan.
- D It incorporates products and technologies into enterprise, service provider, and commercial systems.