After the project charter s approval, the project manager needs to work on detailed project requirements, constraints, and assumptions with stakeholders. However, not all of the stakeholders are immediately available for a meeting in the short term. What should the project manager do in order to gather the information needed from stakeholders?

a$.$ Conduct a meeting to build the project management plan with the stakeholders who are available.

b$.$ Escalate to the project sponsor that not all stakeholders are available for a meeting.

c$.$ Meet with the project management team to build the project management plan before consulting stakeholders.

d$.$ Email, call, or meet with each stakeholder separately to obtain their input.