D.), because that allowed factory workers to work night shifts as well. It's not A.), because that happened during the first Industrial Revolution came about and trains became widespread. B.) doesn't make sense, because you really can only harvest in the daylight, and there's nowhere to put a light bulb. C.) is more of an effect of D.)
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Answer:
nun history is actually a waist of time if you think about it what will you do with the information of knowing who invented a lightbulb-
I’m pretty sure it would be c