The political stability of countries has an impact on the foreign exchange market

Which of the following lists would an economist consider to be land?

a) factories, office buildings, assembly lines, workers b) farm fields, tractors, pesticides, fertilizers c) dams, bridges, rock quarries, oil wells d) iron ore, natural gas, fertile soil, water

Based on the table above, what is the marginal revenue of the tenth unit of output?

A) $190 B) $100 C) $10 D) $9