What is the primary purpose of a RACI matrix?

A To visually represent a project's schedule and track the progress of tasks over time.

B To establish the scope, objectives, and stakeholders of a project.

C To identify the underlying factors or causes that led to a problem or issue in order to prevent it from occurring again in the future.

D To provide a clear, unambiguous, and observable standard of acceptance.

E To clearly define and communicate roles and responsibilities for project tasks and deliverables among project team members.