Why were shops in the Middle Ages fire hazards? A. no fire department
B. no water system
C. flimsy buildings
D. filthy streets

I think it's C, don't quote me tho.

on november 6 and 7, 1917 (or october 24 and 25 on the julian calendar, which is why the event is often referred to as the october revolution), leftist revolutionaries led by bolshevik party leader vladimir lenin launched a nearly bloodless coup d'état against the duma's provisional government.

the answer to your question is c