Final answer:
To prepare for a sudden demand on health care services during a terrorist event, a nurse should prioritize ensuring that the health care facility has a comprehensive emergency response plan in place.
Step-by-step explanation:
In order to prepare for a sudden demand on health care services during a terrorist event, a nurse should prioritize ensuring that the health care facility has a comprehensive emergency response plan in place. This plan should include protocols for triage, communication, and coordination with other agencies and resources. Additionally, the nurse should participate in regular training and drills to familiarize themselves with emergency procedures.