According to the PMBOK Guide, the primary objective of any project is to deliver value to the customer and satisfy their needs and expectations1. The project manager should tell the team members to focus on delivering value to the customer by ensuring that the project deliverables meet the quality standards, the requirements, and the acceptance criteria2. Therefore, the best option is to deliver value to the customer. Option A is incorrect because reducing cost for the customer may not be the main focus of the project, as it may compromise the quality or the scope of the project. Option C is incorrect because working together as a team is important, but it is not the ultimate goal of the project. Option D is incorrect because finishing the project on schedule may not be enough to deliver value to the customer, as it may not reflect the quality or the functionality of the project deliverables. References: 1: PMBOK Guide, 6th edition, section 1.2.2, p. 7 2: PMBOK Guide, 6th edition, section 5.1.3.1, p. 149