Which selector should be modified based on UiPath best practices for robust and stable automation?

The best choice for modification based on UiPath best practices for robust and stable automation is the selector associated with the parent id and tag. This selector is typically more complex and specific, as it often includes attributes that may be more prone to changes compared to other selectors.

When automating, a selector like the one that includes the parent id relies on an identifiable structure within the application, which can provide better reliability if the element hierarchy remains constant. However, if there's a small change in the application’s UI or the attributes used, this particular selector could fail.

In contrast, selectors that rely on indices (like idx values) can lead to fragility because they are highly dependent on the order of elements on the page and can break easily when the UI undergoes minor changes. The same issue applies to selectors that use simple attributes or common tags without any unique identifiers.

Choosing to modify the selector with the parent id and tag enhances the robustness of the automation, as it is more contextually aware of the structure it is dealing with. Such a strategy aligns with best practices that prioritize maintainability and stability in automating tasks.