In hindsight, it is clear that jefferson was correct and the missouri compromise was only a "reprieve." what evidence was available in 1820 to support jefferson's point of view; and what trends had already begun to emerge that would lead the intensification of the conflict over slavery in the decades to come?

answer: the time zones used to be whatever the local authority wanted them to be. one town might have 6am whenever the sun came up and another town had 6am 10 minutes later.  

the trains had a hard time when their orders said to be at a certain point at 6am.  

6am, but who's 6am.  

the railroads got together and set the time zones more or less along the longitude lines across the country.

explanation:

your answer would be a) no nation can be economically self-sufficient.

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