Answer:
(D) If any bystanders are available to help
Explanation:
The purpose of scene size-up is to expeditiously ensure that there is a safe scene on which to provide care, and that the proper resources are summoned to the scene according to the number of patients and their specific care needs. Scene size-up is the initial evaluation of the scene by an EMT. The first action or primary concern of an EMT when arriving at the scene is their own safety.