MPlaza Test - Multiple Scrum Teams

Hi all,
I have a doubt with a question from MPlaza mock exam.

If you are interested in this mocked tests, you shouldn't keep reading...

Question:
Nine (9) Scrum Teams are working on a single product. Which of the following is the best way of planning Sprints?

Answers:
* The Product Owner and all team members meet and create one Sprint Backlog for the project. All teams will share that Sprint Backlog for the next Sprint.
* The Product Owner meets with representatives from each team to compose the Sprint Goal and select items from the Product Backlog. Then each representative works with his/her team to create their Sprint Backlog.
* Everyone meets in the same time to check the Product Backlog and to receive information from the Product Owner. Then they coordinate dependencies, shift team members as needed, and create their Sprint Backlogs.

Which one do you think is correct?

After reading the Nexus Guide, I thought the second one was correct.

Thank you in advance.