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A patient's vision is recorded as 20/30 when the Snellen eye chart is used.The nurse interprets these results to indicate that:
David Ricardo
An influential British economist known for developing the comparative advantage theory, which explains how nations can gain from trade by specializing in producing goods for which they have a lower opportunity cost relative to other countries.
Tenant Farmers
Individuals who rent land to farm from a landlord.
Economic Rent
Extra income earned by a factor of production (like land or labor) due to its relatively fixed supply, exceeding what is economically necessary to bring it into use.
Landowners
Individuals or entities that hold legal title or ownership of land.
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