In an emergency situation, which of the following indicates the most correct action steps?

Activate EMS, look to see if the victim has a medical alert tag, determine what happened, determine if the scene is safe, observe to see if there are other victims, check to see if anyone knows what happened, observe the victim for life-threatening conditions.
Determine if the scene is safe, determine what happened, look to see if the victim has a medical alert tag, observe to see if there are other victims, check to see if anyone knows what happened, observe the victim for life-threatening conditions, activate EMS.
Check to see if anyone knows what happened, activate EMS, observe the victim for life-threatening conditions, look to see if the victim has a medical alert tag, determine what happened, determine if the scene is safe, observe to see if there are other victims.
Observe the victim for life-threatening conditions, activate EMS, determine what happened, look to see if the victim has a medical alert tag, determine if the scene is safe, observe to see if there are other victims, check to see if anyone knows what happened.

Determine if the scene is safe, determine what happened, look to see if the victim has a medical alert tag, observe to see if there are other victims, check to see if anyone knows what happened, observe the victim for life-threatening conditions, activate EMS.

Rationale: Determine if the scene is safe, determine what happened, look to see if the victim has a medical alert tag, observe to see if there are other victims, check to see if anyone knows what happened, observe the victim for life-threatening conditions, activate EMS is the most appropriate sequence of events in an emergency situation.