Each federal building has specific procedures in case of an emergency to ensure the safety of all employees. All employees immediately exit the building only if there is a fire in the building. If there is an earthquake, employees must shelter-in-place. Based on the information above, which of the following statements MUST be true? radio_button_unchecked If employees shelter-in-place, there is an earthquake. radio_button_unchecked If employees exit the building, there is not a fire in the building. radio_button_unchecked If employees do not shelter-in-place, there is not an earthquake. radio_button_unchecked If employees shelter-in-place, there is an event other than an earthquake. radio_button_unchecked If there is an emergency other than a fire, all employees exit the building