Exam PMP topic 1 question 1256 discussion

In a fixed time and budget project, the customer wants the development of a core component to be based on agile practices, as the final scope of the requirement has not yet been fully developed. The project manager is participating in contract development with the sales team and wants to ensure that development costs do not impact the profitability of the project.

Which two controls should the project manager incorporate into the contract to specifically address the development of the core component? (Choose two.)