A project manager has inherited a project that is $5 million over budget. Which of the following would the project manager do to help determine the root cause of the budget overrun?

Ensuring all tasks were documented during planning addresses a planning quality issue, not necessarily the root cause of a current $5 million budget overrun in an ongoing project.

Reviewing the change control log is helpful for approved changes, but it may not uncover unapproved scope creep or other factors contributing to a budget overrun not captured as formal changes.

Performing qualitative risk analysis is a proactive risk management activity to identify future risks, not a method to determine the root cause of an existing budget overrun.

Reviewing if the project has maintained alignment with its scope is crucial because scope creep or unauthorized changes often lead directly to budget overruns.