Final answer:
The 9-box approach to assessing employees is a performance and potential measurement tool used in talent management, correctly identified by option a).
Step-by-step explanation:
The 9-box approach to assessing employees is a tool used in performance appraisals and talent management. Its truth lies in option a), meaning that it measures employee performance and potential. This approach places employees on a grid based on two axes: performance and potential. The grid comprises nine boxes, each representing a different combination of performance and potential levels.
Thus, it does not include 9 critical core competencies as suggested by option b), is not exclusively focused on values, competency, and results achievement as option c) suggests, nor does it represent a 9-step approach to career planning as implied in option d).
The 9-box grid helps managers identify which employees are ready for career advancement, require further development, or should be considered for other roles better suited to their skills. Moreover, it's often used to support succession planning and strategic workforce development.