The word "hazard" in the last paragraph most probably means ______.

A．what damage was caused by Chicago
B．how the bakers were careless
C．why so many fires happened in the 1600s
D．which cities had fare brigades in the 1600s

A．there were no fire brigades in Rome before the Dark Ages
B．100 years ago, fire fighters would starve to death if not well paid
C．even nowadays, fire still endangers human beings
D．God punished Londoners by setting fire to a bakery