Which statement correctly describes the relationship between screen actions and client actions?

The statement that client actions can call screen actions accurately reflects the interaction between these two types of actions in OutSystems. Client actions are designed to handle events that occur on the client side, such as user interactions, and can execute logic that eventually leads to a screen action being triggered. This means that client actions can effectively communicate with and initiate screen actions as part of their workflow in the application.

In contrast, the relationship expressed in the other options doesn't align with how actions are structured in OutSystems. For instance, screen actions are specifically meant to manage the flow of the UI screen, and they typically do not call client actions directly since their scope is different. Similarly, client actions cannot call server actions directly, as server actions function on the server side and require a different invocation mechanism. The interaction that involves server and client actions is typically via API calls or responses, not through direct calling. Understanding these interactions is fundamental for effectively navigating the OutSystems development environment.