Answer:
Letter B is correct. Lead Users.
Explanation:
Term developed by prof. Eric von Hippel, Lead Users are those users who are able to transform, adapt and modify a company's product or service for their own benefit, as they face the same market needs a while before regular users.
For Prof Eric von Hippel, there are four steps in developing Lead Users:
The premise is that the Lead Users method is effective in identifying innovation and product trends that need to be developed for a market for your needs.