The examples of infrastructure among the options provided would be:
d institutions, administration, and education
Infrastructure typically refers to the underlying framework or systems that support a society, including physical structures (like roads and bridges), institutions (like schools and hospitals), and administrative systems that facilitate the functioning of a community or nation.
Here's a brief explanation of why the other options are not considered infrastructure:
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a local and national politicians: This refers to individuals involved in governance and political processes rather than the systems or structures themselves.
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b coffee, cotton, and tea crops: These are agricultural products, not infrastructure.
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c oil refinement and health care: While these are important services, they are not infrastructure in a broader sense but rather sectors or industries. Infrastructure would include the facilities and systems supporting these activities.
So, "d" is the best answer.