The factor that had the most influence in the transition from wandering tribes to the emergence of cities would be "<span>a. food," since it was a surplus of agriculture that allowed people to develop trades other than farming. </span>
Causation I think if I have the right meaning
1. Africans were easier to spot, color denoted their bondage status, there was nowhere to run once they were taken.
2. Africans were exposed to those who had them in bondage for quite some time, meaning they had developed immunities to many of the trifling diseases their captors carried. So they were viewed as healthier.
3. Some Africans willingly sold their enemies (who were already in slavery/ prisoners of war) in exchange for products like guns, grain, and fabrics.
The government cabinet plays <span>an advisory body to the president role.
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The answer is B spread it throughout an area