All of the following are accurate descriptions of new product ideas, except which one?

• A. New product development starts with idea generation.
• B. Some companies use brainstorming exercises that expand people's minds and generate new ideas around the client's problem.
• C. At the beginning of the process, carefully scrutinize each idea and throw far-fetched and impractical ones out the window.
• D. Customers must be careful not to rely too heavily on customer input when developing new products.