How should crew members prepare for severe turbulence?

Crew members should prioritize safety and preparedness during severe turbulence by securing themselves and ensuring that all passengers are seated with their seat belts fastened. This action is crucial because it minimizes the risk of injury to both the crew and passengers. In turbulent conditions, unsecured passengers can be thrown around the cabin, leading to potential injuries, while crew members who are not secured may also be at risk. Fastening seat belts and securing loose items helps maintain order and safety within the aircraft, allowing for a better response to the situation.

The other choices do not effectively address the immediate safety concerns posed by severe turbulence. Reassuring passengers publicly, while important for maintaining calm, doesn't directly mitigate the dangers presented during turbulence. Diverting the flight to a nearby airport may not be feasible or necessary if the turbulence is brief. Monitoring conditions near the exit is also not a proactive safety measure compared to ensuring everyone is secured in their seats. Therefore, the focus on securing everyone is a critical step in managing turbulence effectively.