Organizations that apply trait theory would believe that people with certain traits would be better in business roles and thus those who have them will thrive better in their organizations.
Based on this, the best option from the available ones in the question would be (C) hiring only from top-ranked business schools.
By doing this, the organizations have taken the assumption that people who studied in business schools will be better equipped to handle the roles in their organizations than someone who isn’t from a business school.