An analytics software as a service (SaaS) provider wants to offer its customers business intelligence (BI) reporting capabilities that are self-service. The provider is using Amazon QuickSight to build these reports. The data for the reports resides in a multi-tenant database, but each customer should only be able to access their own data.
The provider wants to give customers two user role options:
+ Read-only users for individuals who only need to view dashboards.
+ Power users for individuals who are allowed to create and share new dashboards with other users.
Which QuickSight feature allows the provider to meet these requirements?

A. Embedded dashboards
B. Table calculations
C. Isolated namespaces
D. SPICE