What it the main reason for the Scrum Master to be at the Daily Scrum?

What it the main reason for the Scrum Master to be at the Daily Scrum?
A . To gather status and progress information to report to management.
B . To write down any changes to the Sprint Backlog, including adding new items, and tracking progress on the burn-down.
C . He or she does not have to be there; he or she only has to ensure the Development Team has a Daily Scrum.
D . To make sure every team member answers the three questions.

Answer: C