9) Which of these would BEST describe an immediate effect of the invention and mass production of the light bulb?
A) time became standardized
B) agriculture worked longer hours
C) railroad companies expanded routes
D) longer factory hours for all workers

When Edison invented the bulb the duration of this was not significant, so he and other scientists had to work on the life of the bulb. After discovering that the filament that gave the bulb the longest life was the carbon filament. It gave a useful life of up to 1200 hours so the working days could be extended much more.

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9) Which of these would BEST describe an immediate effect of the invention and mass production of the light bulb? A) time became standardized B) agriculture worked longer hours C) railroad companies expanded routes D) longer factory hours for all workers

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9) Which of these would BEST describe an immediate effect of the invention and mass production of the light bulb?
A) time became standardized
B) agriculture worked longer hours
C) railroad companies expanded routes
D) longer factory hours for all workers