The scenario requires a solution that provides both a high-level overview and enforces strict data segregation by region. A dashboard is the standard Qlik Sense feature for creating a high-level sheet with key performance indicators (KPIs) that can navigate to detailed sheets. Section Access is the designated Qlik Sense security feature for implementing dynamic data reduction at the row level. It ensures that when a user from a specific regional team opens the app, the data is automatically and securely filtered to show only their region's data, fulfilling the critical security requirement that users "should only have access to the data in their region."

B. A pivot table that filters by region: A user-applied filter is not a security measure; users could change the filter to view data from other regions, violating the access requirement.

C. A Multi KPI with set analysis: Set analysis defines the scope of a calculation within a chart but does not restrict a user's access to the underlying data in the app.

D. A dashboard with regional bookmarks: Bookmarks are saved selection states for convenience. They do not enforce security and can be cleared, allowing users to select and view unauthorized data.

1. Qlik Sense® for Windows Help, "Managing security with section access": This official documentation states, "You can use section access to control the security of an app. It allows you to define an authorization table in the data load script to control which users can see what data." This directly supports the use of Section Access for the regional data segregation requirement.

2. Qlik Sense® for Windows Help, "How section access works": This section details the mechanism: "When a user opens an app, Qlik Sense authenticates the user... and compares this identity to the authorization table. If the user is authorized, the data is reduced based on the security table entries, and they can access the app." This confirms it is the correct feature for enforcing access rules.

3. Qlik Sense® for Windows Help, "Best practices for dashboard design": This document outlines the purpose of a dashboard as providing an "at-a-glance view of key performance indicators" and enabling users to "drill down into the data for more details," which aligns with the requirement for a high-level sheet that navigates to detail sheets.