To perform an overtaking maneuver safely, it is essential to ensure that **there is enough space to return to the right lane** once the maneuver is completed. This is crucial to avoid risks and ensure the safety of all road users.

- **Checks before overtaking:** Before starting the overtaking maneuver, you must verify that you can return to your lane without endangering other vehicles. This implies that there is enough space to complete the maneuver safely.

- **Preparation and assessment of the environment:** Maintain an adequate distance from the vehicle you wish to overtake and assess the distance and speed of oncoming vehicles. This will help you determine if there is enough space to return to your lane after overtaking.


- **Steps to follow:** Checking is an essential step in the overtaking process. Ensuring that you can return to the right lane without risk is part of this process and is key to completing the overtaking maneuver safely.

In summary, verifying that there is enough space to return to the right lane is an essential safety measure when overtaking, and that is why it is the correct answer.