When should new work be added to the Sprint Backlog during a Sprint?

New work should be added to the Sprint Backlog as soon as it is identified if it is necessary for the Sprint goal. This aligns with the idea that the Sprint Backlog is a living document that evolves throughout the Sprint. If a new requirement or task emerges that can contribute to achieving the Sprint goal, the Development Team can discuss and assess this new work during the Daily Scrum and decide to incorporate it into their Sprint activities. This flexibility allows the team to respond to changing needs and ensures that they focus on delivering the highest value possible.

The other situations mentioned in the choices are not suitable for adding new work to the Sprint Backlog. The Daily Scrum is primarily for synchronization and planning the day's work, not for introducing new tasks. During the Sprint Review, although feedback and new insights can be gathered, changes to the Sprint Backlog typically occur based on feedback for future Sprints rather than during the active Sprint. Lastly, modifications to the Sprint Backlog should not be made before Sprint Planning, as that stage is dedicated to defining the work for the upcoming Sprint, rather than adding tasks to an already ongoing Sprint.