Which of the following roles can view dashboards without any additional permissions?

The scenario where users can view dashboards without requiring additional permissions is accurately represented by the option indicating that users with at least one internal role can do so.

In many analytics platforms, internal roles are designed to include a certain level of access that allows users to view dashboards as part of their default permissions. This means that any user assigned a role that is categorized as internal inherently has the capability to access and view these analytics dashboards without needing further permissions. This functionality is essential for ensuring that users engaged in data analysis can work efficiently and collaboratively without administrative barriers.

The other options pertain to specific user roles: users with a 'viewer' role typically have limited permissions focused solely on viewing content, but they may require additional permissions depending on the organization’s access configuration. External roles generally denote permissions for users outside the core organization, which usually come with restricted visibility. Lastly, Admin roles typically have broader accesses that include management capabilities but are not singularly necessary for viewing dashboards compared to the broader category of users with internal roles. Thus, the correct understanding hinges on recognizing the inclusive nature of internal roles regarding dashoard access.