The project manager should schedule a virtual meeting so onsite and remote stakeholders can attend at the same time because this is the most efficient and effective way to communicate the project objectives, scope, deliverables, and expectations to all the relevant stakeholders. A virtual meeting can also facilitate interaction and feedback among the participants, and foster a sense of collaboration and commitment. The other options are not the best choices because they do not ensure that all the stakeholders are informed and engaged at the same level. Emailing all stakeholders with the objectives of the project and asking for feedback (option A) may not reach all the stakeholders, or may not elicit timely or adequate responses. Waiting for a date when all required attendees can be available onsite (option B) may cause unnecessary delays and risks to the project.
Running separate meetings to accommodate everyone's schedule (option C) may create inconsistencies and confusion among the stakeholders, and increase the workload and complexity for the project manager. References: PMBOK Guide, 6th edition, pages 367-368, 376-377. PMP Sample Test Questions. PMP Questions page 417.