Which of the following can be used across all the visualizations in a workspace?

The user experience filter can indeed be used across all visualizations in a workspace, making it a powerful tool for ensuring consistency and relevance in the data presented. This filter allows users to apply a specific set of criteria that would dynamically adjust the data shown on all visualizations simultaneously. This feature enhances user interactivity and allows for a more tailored analysis, as changes applied through the user experience filter are reflected across the entire workspace, ensuring that all visual elements respond to the same set of filtering conditions.

In contrast, the other options have more limited applicability. For example, a signal is generally used for specific alerts or notifications rather than as a universal filter applied across multiple visualizations. Similarly, the dashboard builder is a tool for creating and organizing visual components within a specific dashboard rather than a feature utilized across all visualizations in a workspace. Lastly, Studio refers to a development environment that is focused on building or customizing specific components, not a mechanism for applying filters across a workspace.