To correctly answer this question, it is worthy to note that what we are talking about the question “What authority does a team have after it has committed to a sprint goal?” is the Scrum Team which collectively works together to complete the set of goal that they have committed to complete in a sprint.
The logic behind this answer is fairly easy to understand. From the given definition and also the given question, the most important word that we must consider is the word “committed”. Once they commit to do something, they will, of course, do whatever is necessary to achieve that goal. Hope this helps!
The team does whatever is necessary to achieve the goal. It should be noted that teams are always supposed to do everything in order to reach the goals that are given to them. They have spent a lot of time planning and doing necessary changes in order to make the goal come true.
They can only truly reach the goal if they would do whatever it takes in order to reach that goal easily. This means that members of the team will always have to be committed in reaching and achieving their goals. This is not going to be easy but the dedication of the team will make things possible.