Which of the following actions can be performed in additional dashboard actions?

The correct choice encompasses a range of functionalities that users can perform within the additional dashboard actions settings. Specifically, actions like bookmarking dashboards allow users to save and easily access important data visualizations later. Certifying dashboards indicates that the visualizations presented meet specific standards and can be trusted for decision-making. Sharing enables collaboration by allowing other users to view the dashboard, while adding tabs helps in organizing multiple visualizations within a single dashboard space. Deleting gives users the ability to remove unnecessary or outdated dashboards.

This comprehensive suite of actions enhances user interaction with the dashboard and supports better data management and collaboration. The other options either limit the available functionalities or include actions that aren't relevant to the dashboard settings. For instance, creating new visualizations is typically handled elsewhere in the platform, and deleting users does not pertain to dashboard actions.