Which was not a problem faced by workers in nineteenth century mills or mines? a. poor air quality b. low pay c. eight-hour days d. dangerous machinery

Read the sentence from the war of the worlds. i turned, and as i did so the screw must have come out, for the lid of the cylinder fell upon the gravel with a ringing concussion. which option is the accurate synonym of the word concussion as it is used in the sentence? explosion disruption crash interruption