John had his room ______ yesterday, so it looks nice.

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

A．2 mainly explains ______.A. what damage was caused by ChicagoB. how the bakers were carelessC. why so many fires happened in the 1600sD. which cities had fare brigades in the 1600s