Answer:
B) You should report the hazard as soon as possible.
Explanation:
The common welfare and safety its a matter that includes all the people, neighborhoods, areas, districts, and whole cities (etc) need to work and foment mutualism between each other, in order to guarantee a proper and safe public environment.
In this case, with an inevitable hazard happening, its mandatory to react immediately, report it to the respective authorities (firefighters and other first responders) and proceed eliminating the source of danger, doing it at the fastest way possible (reporting the incident) will influence vitally the outcome of all the events (saved lives, collateral damages, etc)
