I)By seniority: The longer you've had a Trailhead account, the higher your rank is. II)You earn points and badges by completing modules and projects. III) You work your way through an entire trail. IV) You finish every module and project. [bg_collapse view="button-orange" color="#4a4949" expand_text="Show Answers" collapse_text="Close Answer" ] Answer: II)You earn points and badges by completing modules and projects. [/bg_collapse]