What was the background of the slaves who were taken to european forts along the african coast to be traded in the mid-sixteenth century?

The slaves came from villages in Africa which had been raided or captured by stronger groups

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:

hello,

the steamboat is your answer.

it seems like its the only form of transportation on the choices.