What should the Scrum Master do?

Five new Scrum Teams have been created to build one product. A few of the developers on one of the Development Teams ask the Scrum Master how to coordinate their work with the order teams.

What should the Scrum Master do?
A . Teach the Product Owner to work with the lead developers on ordering Product Backlog in a way to avoid too much technical and development overlap during a Sprint.
B . Teach them that it is their responsibility to work with the other teams to create an integrated Increment.
C . Collect the Sprint tasks from the teams at the end of their Sprint Planning and merge that into a consolidated plan for the entire Sprint.
D . Visit the five teams each day to inspect that their Sprint Backlogs are aligned.

Answer: C