What approach should the project manager take to remove this impediment?

A team is ready to start working on a project with a customer who was very difficult to work with in the past because the customer was unable to describe exactly what they wanted.

What approach should the project manager take to remove this impediment?
A . Follow a predictive approach in order to obtain formal acceptance of each deliverable
B . Work with the product owner to define the minimum viable product(s)
C . Reinforce the negotiation and soft skills of the team through training
D . Develop and monitor a plan with due dates to reduce the time of completing the product

Answer: A