Answer:
D: modern technology
Explanation:
Modern technology was usually imported from other countries and was not a domestic resource to Africa.
<span>Main sources of tin come from China, Indonesia, and Peru
Whilst lesser sources include Brazil, Bolivia, Australia,
There are a dozen more countries though</span>
Advanced cities are center for trade with a large population and an organized government a long-lasting pattern of organization in a community such as economy, religion, government, education
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