A project manager has been assigned to a new project that will be delivered using...

 In an agile framework, it is beneficial to review the completion costs of similar projects as it provides a realistic baseline for the new project’s cost estimation. This approach is supported by the PMBOK guide, which suggests using historical information and lessons learned from similar projects to inform cost estimations1. Additionally, involving the client representative (option A) is also a good practice in agile projects to ensure that the estimation aligns with the client’s expectations and priorities2. However, the primary action should be to review similar past projects for a more accurate estimation.