The correct answer is B, because the time-box for a Daily Scrum is 15 minutes. The Scrum Guide states that ''the Daily Scrum is a 15-minute time-boxed event for the Development Team to synchronize activities and create a plan for the next 24 hours.''

According to the Scrum Guide, the Daily Scrum is held at the same time and same place to reduce complexity and promote consistency. The other options are not valid reasons for holding the Daily Scrum at the same time and same place, as they are either irrelevant (such as naming the place) or incorrect (such as being demanded by the Product Owner or booking rooms in advance).

The correct answer is C, because the Scrum Guide states that ''the Development Team usually starts by designing the system and the work needed to convert the Product Backlog into a working product Increment. Work planned for the first days of the Sprint by the Development Team is decomposed by the end of this meeting, often to units of one day or less. The Development Team self-organizes to undertake the work in the Sprint Backlog, both during Sprint Planning and as needed throughout the Sprint.'' Therefore, enough work should be defined during the Sprint Planning event so that the Development Team can create its best forecast of what it can do, and to start the first several days of the Sprint.

According to the Scrum Guide1, the definition of ''Done'' is a formal description of the state of the Increment when it meets the quality measures required for the product. The definition guides the Development Team in creating a ''Done'' Increment. The definition of ''Done'' is created by the development organization (or Development Team if none is available from the development organization). The definition of ''Done'' may vary significantly per Scrum Team, depending on the context. One aspect of Scrum Teams inspecting how they work toward their Product Goal is that they improve their definition of ''Done'' over time. Therefore, one good way for a Scrum Team to ensure security concerns are satisfied is to add security concerns to the definition of ''Done''. Another good way is to have the Scrum Team create Product Backlog items for each concern, as they are responsible for managing and refining the Product Backlog.

The correct answer is B, because the time-box for the Sprint Planning meeting is 8 hours for a monthly Sprint. The Scrum Guide states that ''Sprint Planning is time-boxed to a maximum of eight hours for a one-month Sprint. For shorter Sprints, the event is usually shorter.''