As a staff accountant at Anderson & Paul, a CPA firm located in downtown San Diego, what are the initial steps recommended when a First Aider approaches an accident?

A) Conduct a victim assessment and administer first aid immediately.
B) Review the scene size-up steps and victim assessment steps, then simulate these steps with a fake victim.
C) Call emergency services and gather witness statements.
D) Secure the area and wait for professional medical assistance to arrive.