What was the main goal of the coastal african kingdoms that were part of the slave trade? a. to have freedom from european kings b. to have europeans move into the african countries c. to get rid of people who caused trouble in their country d. to obtain guns and other products from europe

D. To obtain guns and other products from Europe

Explanation:

The coastal african kingdoms didn´t have the same technology as the Europeans had, and in order to gain power and expand their kingdoms they needed more power and influence over inland african empires, the advantage that the guns gave them over the tribal empires of continental africa put them one step ahead of their enemies, helping them becoming the rulers of Africa, with the help of trade with the european powers of slaves for guns and other products.

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: