Which of the following are considered best practices in UiPath development?

Best practices in UiPath development are crucial for creating maintainable, efficient, and understandable automation projects.

Leaving target applications opened can create reliability issues in automation processes. This could lead to unexpected behaviors or errors during execution, especially if the application is not in the expected state or if it has changed its interface.

Removing unreferenced variables is essential for code clarity and maintainability. When variables are not used in the project, they can create confusion for anyone reviewing or working on the code in the future. Eliminating these helps keep the workflow organized and easier to understand.

Deleting disabled code contributes to the project's cleanliness. Disabled code may create uncertainty about what parts of the workflow are active and can lead to misunderstandings during project handovers or collaborations. Having a clean codebase with only the active and necessary components makes it easier for developers to work with the project.

Considering these elements, the option that encompasses the best practices in UiPath development includes all necessary actions to ensure the quality and maintainability of the automation projects. Thus, adopting all these practices leads to robust and effective RPA solutions.