The slave trade had many effects on Africa. Most of them were, of course, negative, though we can argue that the slave trade was positive for some African states at least in the short term.
One negative about the slave trade was that it tended to increase the amount of war that occurred in West Africa. The reason for this is that European (and American) slave traders did not simply go out into the African countryside and kidnap their own slaves. Instead, they bought slaves from the coastal kingdoms. Those kingdoms generally got slaves to sell through war and through raiding against inland tribes. Because the slave traders wanted more slaves, the coastal kingdoms were encouraged to wage more wars and conduct more raids against their neighbors. In addition, those kingdoms were provided with things like guns in exchange for slaves. This helped those kingdoms have more of a capability of waging war.
        
             
        
        
        
Answer:
The company was founded in 1894 in Derry Township, PA
Explanation:
plz mark brainliest :D
 
        
                    
             
        
        
        
Answer:
Astronomers and telescopic evidence
Explanation:
Question asking:
Which connection helps the reader understand how supermassive black holes were found? 
Answer: 
Astronomers and telescopic evidence
Explanation for answer:
Since the passage given that Astronomers found stars careening around these centers, zooming at previously unheard-of speeds in their orbits and telescopic evidence confirmed the amazing cause: a supermassive black hole, with the mass not of one imploded star, not of two, but of millions – maybe even billions.
 Thus, base on the given we can know that telescopic evidence confirmed the amazing cause: a supermassive black hole so the only answer with telescopic evidence and astronomers is [B] astronomers and telescopic evidence
<u><em>~Lenvy~</em></u>
 
        
                    
             
        
        
        
Answer:
D. Sense of self-interest
Explanation:
I just took the test and D is right