How was the railroad industry affected by mass production?
the high volume of mass production made the use of time zones unnecessary.
railroads, once built by hand, were now built entirely by machines.
mass production encouraged new methods for railroad administration.
increased factory production resulted in a growing need to transport more goods.

increased factory production resulted in a growing need to transport more goods.

Explanation:

needed quicker more effective ways of transportation to increase their profits.

Increased factory production resulted in a growing need to transport more goods.

Explanation:

Once the Railroads were developed and completed around America, transport of goods were easier and faster than before, factories that needed goods to produce products would receive them in less time than before. Goods would be transported to all corners of the country in a fast velocity. All of this created a commerce boom, people would more things, more things would be produced and more money would be earned. This caused a great economy boost.

- "it was a failure that was an embarrassment for the kennedy administration."

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the answer is a. laws were enacted in the aftermath of the plot to make it harder to free slaves,increasing sectionalism