Exam CBAP topic 1 question 405 discussion

A martial arts organization has been expanding throughout the mid-Atlantic states and has hired a business analyst (BA) to create a system that will enable the organization to manage its growing needs. The following list describes some of the operations of the martial arts organization:
✑ The martial arts organization offers a variety of seminars to trainees that span the entire spectrum of the martial arts training system.
✑ Each seminar is made up of a set of techniques.
✑ Coaches in the martial arts organization are assigned seminars to teach according to the area that they specialize in and their availability.
✑ The martial arts organization publishes and maintains a web-based calendar of the different seminars (and the assigned coaches) every quarter for the trainees to view.
✑ strator in the martial arts organization manages the seminars (including seminar content), assigns seminars to coaches, and defines the seminar schedule.
To ensure understanding of the business need, the BA has created three Unified Modelling Language (UML) diagrams, which are shown below:



The seminar administrator reviewed these three diagrams and asked the BA to create a fourth diagram to model the various levels that a trainee goes through
(e.g., while belt to yellow belt, yellow belt to green belt, etc.). What modeling technique will the BA use to create this diagram?