According to the Scrum Guide, two activities that a Product Owner may engage in during a Sprint are updating management on what is being worked on and answering questions from the Development Team about items in the current Sprint. These activities are part of the Product Owner's responsibilities to manage and prioritize the Product Backlog, communicate with stakeholders, and collaborate with the Development Team. The other options are not activities that a Product Owner should engage in during a Sprint, as they are either done by the Scrum Master (such as running the Daily Scrum) or by the Development Team (such as prioritizing their work on the Sprint Backlog).