Your Company Set Up a Complex Organizational Structure on Google

Your company set up a complex organizational structure on Google Could Platform. The structure includes hundreds of folders and projects. Only a few team members should be able to view the hierarchical structure. You need to assign minimum permissions to these team members and you want to follow Google-recommended practices. What should you do?

A) Add the users to roles/browser role.
B) Add the users to roles/iam.roleViewer role.
C) Add the users to a group, and add this group to roles/browser role.
D) Add the users to a group, and add this group to roles/iam.roleViewer role.