What is the first step that should be done when a fire has been detected?

A.
Turn off the HVAC system and activate fire door releases.

B.
Determine which type of fire it is.

C.
Advise individuals within the building to leave.

D.
Activate fire suppression system.

Explanation:
Human life takes precedence over any other item, especially material
items. Although the other answers are important steps to take place in this type of
situation, the first step is to warn others to save as many lives as possible.