What is a key feature of outward-opening doors?

The key feature of outward-opening doors is that they are specifically designed to facilitate exit. This design allows individuals to push the door open away from the building, which can be critical in emergency situations where a quick exit is necessary. Outward-opening doors often provide an unobstructed path to safety, helping to prevent congestion during evacuations, especially in crowded settings.

While the other options provide some context for outward-opening doors, they do not directly capture this essential characteristic. For instance, while some residential doors may open outward, they are also commonly found in commercial and public settings. The mention of exposed stiles is more about the door's construction than its functionality. Additionally, the accessibility of hinges can vary and is not a defining feature of all outward-opening doors. Ultimately, the design's primary advantage is its function in promoting safety and ease of egress.