Correct Answer: B, CThe likely factors that led to the stakeholders' disappointment and anger are that the Product Owner has not been keeping the stakeholders aware of the progress of the project and that the stakeholders haven't been using the Sprint Reviews to inspect and evaluate progress. In scrum, it is crucial for the Product Owner to maintain transparency with stakeholders about the project's progress. Regular updates and feedback during Sprint Reviews help ensure that the product aligns with stakeholders' needs and expectations. Ignoring these key practices can lead to a misalignment between the delivered product and the stakeholders' requirements, causing discontent.