Which step is crucial for ensuring that lug nuts are not lost during a tire change?

Placing lug nuts in a cup or container is crucial for ensuring they are not lost during a tire change because it provides a safe, organized, and designated space for the nuts. This method prevents them from rolling away, falling into hard-to-reach areas, or being accidentally discarded. When lug nuts are simply kept in a pocket or scattered on the ground, there's a high risk of misplacement, leading to potential delays in the tire-changing process or the need for a replacement. Storing them in the engine compartment also poses risks as they could end up lodged in components or create a hazardous situation when the engine is in operation. Using a cup or container is thus the most effective way to keep track of the lug nuts and ensure a smooth tire change.