Mid-iteration, the product owner reports government legal changes that alter the product definition. How should the project manager proceed?

The correct approach is to review the iteration backlog because a fundamental change in product definition, especially due to legal requirements, necessitates an immediate reassessment. Continuing work without understanding the impact could lead to wasted effort or non-compliance. The project team, in collaboration with the Product Owner, needs to determine how these legal changes affect ongoing work and future plans. "Continue work and ask the product owner to assess the changes and add/remove the stories as needed in the backlog" is incorrect because continuing work without understanding the impact of legal changes is risky and could lead to rework. "Ask the product owner to add new changes to the bottom of the backlog in order to handle the modifications as a change request" is incorrect because legal changes are often critical and cannot simply wait at the bottom of the backlog; they require immediate attention and prioritization. "Ask a business analyst to assess the changes and then add/remove the stories in the backlog and prioritize them by business value" is incorrect because while a business analyst can help, the primary responsibility for the product backlog and its prioritization, especially in response to significant changes, lies with the Product Owner, and the entire team needs to be involved in understanding the impact on the current iteration.