Explanation
The project manager should call a stakeholder meeting along with team members and seek consensus about the design features. This is because the project manager needs to resolve the conflict among the team members and ensure that the design meets the stakeholder expectations and requirements. The project manager should use conflict resolution techniques such as collaborating, compromising, or problem-solving to facilitate a constructive dialogue and reach a mutually acceptable agreement. The project manager should also consider the impact of the design features on the project scope, quality, schedule, and cost and communicate any changes or issues to the relevant stakeholders.
Option A is not a good action, as asking the project sponsor to make the decision about the design features may not be appropriate or effective. It may also undermine the team members' autonomy, creativity, and ownership of their work. The project manager should try to involve the team members and other stakeholders in the decision-making process and not rely on the project sponsor's authority or influence.
Option C is not a good action, as asking stakeholders to reduce the scope in order to meet project deadlines may not be feasible or desirable. It may also create dissatisfaction, confusion, and resistance among the stakeholders. The project manager should try to deliver the project scope as agreed and not change it without proper justification and approval.
Option D is not a good action, as reviewing the design with the team members and proposing a new launch date may not be necessary or beneficial. It may also create additional risks, issues, and delays for the project. The project manager should try to launch the project as planned and not postpone it without proper justification and approval. References:
[PMBOK Guide], 6th edition, page 386, section 10.3
[PMP Exam Content Outline], page 12, task 4 under domain 3