According to the PMBOK Guide, the project manager should be involved in the procurement process to ensure that the project requirements are clearly defined and communicated to the potential suppliers1. The project manager should also verify that the project objectives are aligned with the business needs and the expectations of the stakeholders before approving an agreement2. Therefore, the best option is to ensure that the requirements for the project are understood and that the objectives are verified before approval of an agreement. Option B is incorrect because informing the project sponsor that there cannot be any changes to the scope of the project is unrealistic and may not account for the possible risks and uncertainties that may arise during the project execution3. Option C is incorrect because notifying the project sponsor that the project manager cannot be involved in the agreement negotiation process is not a proactive or collaborative approach, and may result in a poor or unsuitable agreement for the project. Option D is incorrect because asking the project sponsor to involve the legal department in the negotiation for the project agreement is not the responsibility of the project manager, and may not address the issue of the project manager's participation in the procurement process. References: 1: PMBOK Guide, 6th edition, section 12.1.3.1, p. 465 2: PMBOK Guide, 6th edition, section 4.1.3.1, p. 89 3: PMBOK Guide, 6th edition, section 5.6.3.1, p. 161 : PMBOK Guide, 6th edition, section 12.2.3.1, p. 473 : PMBOK Guide, 6th edition, section 12.2.3.2, p. 474