When Evading (sheltering in place), staff should:

When considering the practice of evading or sheltering in place, it is essential for staff to adopt a comprehensive approach that combines multiple strategies for ensuring safety and effective communication during an emergency. The correct answer, which encompasses all relevant aspects of response, emphasizes the importance of coordinated efforts and situational awareness.

Acting independently, while sometimes necessary, should be tempered with awareness of the overall situation and the actions of others. This allows for a collective effort to address emergencies more effectively. Staying in one location until help arrives is a critical safety measure that prevents unnecessary movement and exposure to potential dangers, ensuring that staff remain safe until they receive further instructions or assistance. Additionally, maintaining communication via phone is vital; however, it should be done judiciously to avoid overloading communication lines, especially in a critical situation.

Thus, the best course of action is to integrate these strategies, leading to a comprehensive response to the situation, which is why the option that includes all these elements is the correct choice.