According to the Scrum Guide 1 , each event in Scrum is a formal opportunity to inspect and adapt something. These events are specifically designed to enable critical transparency and inspection. Failure to include any of these events results in reduced transparency and is a lost opportunity to inspect and adapt. All events are time-boxed events, such that every event has a maximum duration. Once a Sprint begins, its duration is fixed and cannot be shortened or lengthened. The remaining events may end whenever the purpose of the event is achieved, ensuring an appropriate amount of time is spent without allowing waste in the process. The time-box for the Daily Scrum is 15 minutes or less for a one-month Sprint. Its location and time remain constant.
References: Scrum Guide

If the Development Team cannot complete its work by the end of the Sprint, then the Sprint length holds and the Development Team continuously learns what is actually possible to do within a Sprint of this length, as stated in [7]: "If a Development Team determines it has overcommitted itself for a Sprint, one option is to collaborate with the Product Owner to negotiate removing or reducing scope. Another option is to simply work hard and do its best, without cutting quality or pressuring individuals. In either case, the Development Team learns from its experience and uses this learning when planning future Sprints."

The correct answer is B, because the Development Team determines how work is performed during the Sprint. The Scrum Guide states that "development Teams are self-organizing. No one (not even the Scrum Master) tells the Development Team how to turn Product Backlog into Increments of potentially releasable functionality." Therefore, the Development Team has the autonomy and responsibility to organize and manage its own work.

According to the Scrum Guide, two intended outcomes of the Daily Scrum are identification of impediments that may prevent the Developers from achieving the Sprint Goal and a shared understanding of the most important work to be undertaken next to achieve the best possible progress toward the Sprint Goal. These outcomes help the Developers to inspect their progress, plan their work, and collaborate effectively. The other options are not intended outcomes of the Daily Scrum, as they are either irrelevant (such as updating a Scrum board) or inappropriate (such as providing a status report or an update of completed tasks).

A Developer is accountable for creating a plan for the Sprint, the Sprint Backlog, and organizing the work required to meet the Sprint Goal, as stated in the Scrum Guide: "Developers are the people in the Scrum Team that are committed to creating any aspect of a usable Increment each Sprint. The specific skills needed by the Developers are often broad and will vary with the domain of work. However, the Developers are always accountable for:
Creating a plan for the Sprint, the Sprint Backlog;
Instilling quality by adhering to a Definition of Done;
Adapting their plan each day toward the Sprint Goal; and,
Holding each other accountable as professionals."