What should users do if their Kanban board has a long list of issues in their backlog column?

Which of the following are true about labels? (Choose four.)

Sarah created a new custom field called 'Project Cost'. She cannot view the field in some of the issues.
Which of the following is true?

Nash is working on a mobile application project for the Google Company. Anyone from Google Company can comment on the project's issues, but only developers will have access to create new issues. Nash wants to create a new team-managed project for this task. Suggest the best access level for Nash to use in his project.
Note:
- Company-managed projects are formerly known as classic projects.
- Team-managed projects are formerly known as next-gen projects.

Which of the following is true after users change their project key to a new key?