According to the graph, which of these is true about enslaved african populations in the nineteenth century?
a) sierra leone had more slaves than igbo did.
b) madagascar had the largest population of slaves.
c) less than half all african populations were enslaved.
d) over one-third of all african populations were enslaved.

D) i just answered it

Explanation:

According to the graph, about one-third of all African populations were enslaved. In this graph alone, each of the featured populations is made up of at least 30 percent of slaves. This was a common trend in Africa during the nineteenth century.

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i truly dont know the answer wait i do its 1,3,4