To provide a reasonable conclusion based on the information in the table, I would need to see the specific data presented in that table. Unfortunately, I don't have access to the content of the table. However, I can help guide you on how to evaluate the options based on typical economic concepts:
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Sudan invests more in capital goods than Nigeria - This would require data on capital investment for both countries.
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Egypt is more economically specialized than Nigeria - Specialization can be assessed through sectors contributing to GDP, exports, etc.
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South Africa has a higher standard of living than Sudan - This can be determined based on GDP per capita or other standard of living indicators such as health, education, and income levels.
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Nigeria has more barriers to trade than South Africa - Information on tariffs, trade agreements, and regulatory measures would be required to assess this.
Please provide the relevant information from the table, and I can help you analyze it further.