As a project manager for the development of a new product, you and your team will be working with the customer to understand how the product works. It is hard to predict the required efforts during the early stages of the project. What approach should you adopt to ensure that the new product and its key features meet customer satisfaction? 

a. Waterfall project management approach 

b. A hybrid approach that combines predictive and incremental project management approaches 

c. Agile project management approach 

d. An incremental approach that is based on stage gates