Recognize the practice of slavery and other forms of forced labor experienced
during the 13th through 17th centuries in east africa, west africa, europe, southwest asia, and
the americas.

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:

logging hope this

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