Final answer:
The 'Group & Sort' button is found in the 'Arrange' group of the Report Layout Tools Design tab, which is used for managing elements in report organization.
Step-by-step explanation:
The Group & Sort button that you are referring to is found in the Report Layout Tools Design tab. Specifically, it is located within the Group & Sort area, which can be found under one of the groups that organizes different layout options and tools. The correct answer to your question of which group contains the Group & Sort button is:
Arrange:This is the group that provides options for organizing and managing the different elements and data within your report. Keep in mind that organizing your ideas and structuring your report is essential for clarity and coherence, so using the Group & Sort function can be very useful.