The app builder should recommend utilizing the manage assignments button to assign a permission set group and additional individual permission sets to each user. This way, the app builder can assign the five consistent permission sets to all users in one permission set group, and then assign additional permission sets to higher-level staff as needed. Option B is incorrect because it will not account for the varying levels of support staff and their different permission sets. Option C is incorrect because the Data Import Wizard cannot be used to assign permission sets or permission set groups to users. Option D is incorrect because the Data Loader cannot be used to assign permission set groups to users.