Rollover crashes are particularly susceptible to which of the following?

Rollover crashes present a significant risk for ejection, making it the correct answer. During a rollover, the vehicle's structure and design can lead to compromised safety features, such as seatbelts and window integrity. If occupants are not properly restrained, they are at a heightened risk of being thrown from the vehicle as it rolls over. The motion of the vehicle combined with external forces can create conditions where the occupants, especially those not wearing seatbelts, are expelled from the vehicle, leading to severe injury or fatality.

In the context of rollover crashes, while fire, intrusion, and mechanical failure can be concerns, they are not as strongly associated with rollover incidents as the risk of ejection. Fire typically occurs after a crash rather than directly due to the rollover itself. Intrusion is more associated with frontal or side impacts where structural deformation occurs, while mechanical failure is an issue that can lead to various types of crashes, not specifically rollovers. Thus, the focus on ejection highlights the unique dangers present in rollovers, particularly concerning unrestrained vehicle occupants.