Which of the Following Statements Is True About Velocity

Multiple Choice

Which of the following statements is true about velocity?

A) After a scrum team commits to requirements in a scrum period,it estimates the velocity it can achieve.
B) A team should approach the scrum master to change the order of the requirements it has committed to.
C) The customer sets the velocity of each scrum period.
D) When a project begins,the senior team members guess the velocity of the team.