Alpha Cleaning Equipment Co

Alpha Cleaning Equipment Co.has started the actual design and development of a new floor buffing machine.It also has the details of manufacturing,marketing,and operations of the new product.According to the stage-gate process,what is the next stage of the project?

A) Launch the product by producing it commercially and selling it.
B) Verify and validate the new product, its marketing, and production.
C) Form a focus group to make sure the product meets user expectations.
D) Build a business case to justify the project.