Final answer:
None of the provided options (actual expenditures, project schedule, budget, baseline) represent a stakeholder group. Internal stakeholders are typically individuals or departments within an organization involved in a project.
Step-by-step explanation:
The question pertains to internal stakeholders of a project. An internal stakeholder is typically someone from within the organization who is involved with the project. This includes individuals such as employees, managers, or owners who have a direct influence or interest in the project's success. The options given (project expenditures, schedule, budget, and baseline) are all components or tools used in project management rather than stakeholders. However, they are managed and used by stakeholders.
Of the given options, none directly represent a stakeholder group. It seems there might be a misunderstanding in the question presented. Internal stakeholders would be better exemplified by groups such as the project team, executives, or internal departments within the organization - not the management tools listed.