In the 1906 San Francisco earthquake, much of the damage was due to fires because ________.
◦ the shaking caused gas lines to rupture everywhere and these ignited to cause huge fire storms in the city
◦ water lines were badly damage so that firemen could not put out the fires
◦ a cow kicked over a lantern in a barn and started the fires
◦ electric power lines fell and caused sparks that started fires