A project has been running for 2 months and now requires approval for a supplier to begin some execution tasks. The project team has evaluated several suppliers and selected their top two preferred suppliers. The project sponsor requested that another supplier who has lower costs be added to the list. However, the project manager is aware that this supplier does not always fulfill the project requirements. What should the project manager do? A. Set up a requirements review session and obtain agreement for selection criteria. B. Recommend to the team to add the sponsor's preferred supplier to the list. C. Choose the sponsor's preferred supplier for the project to avoid conflict between the team and sponsor. D. Recommend to the sponsor to review the results of the team's supplier evaluation