The student has successfully identified the key concept of sustainability, which is a crucial requirement for the Internal Assessment. The research question tackles a past issue, specifically analyzing the sustainability of Chatime's existing franchise system. The student has appropriately based their work on a single business, Chatime, and has selected a real business issue related to the syllabus. Additionally, they have provided background information about Chatime and a clear outline of the sustainability issue. Although the methodology used to investigate the issue was not clearly explained, the student effectively maintained a focus on sustainability throughout the entire work, thereby linking the investigation to the key concept.