Increasing trade can increase productivity by encouraging exporter of services?

Trade improves productivity in three important ways. First, imports expose domestic firms to greater competitive pressure, while giving them access to more and better inputs. Second, exporters increase productivity by learning from overseas customers and through exposure to competition from foreign producers.

Explanation:

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c. archbishop desmond tutu promoted the acknowledgement of the rights of black africans and expose human rights abuses.

d. leader haile selassie modernized african society through the institution of progressive social, economic, and educational reforms.