In a natural monopoly, the long-run average cost curve declines and therefore average cost is lower when there is only one seller

It is generally easier to prevent deforestation than fishery collapse because:

A. it is easier to establish and enforce property rights on national lands than in international waters. B. there is greater incentive to have sustainable forests than sustainable fisheries. C. the demand for wood products has dropped significantly while the demand for fish has grown significantly.

In the market for euros, the supply of euros (€) is

A) downward sloping, because lower dollar prices of euros mean that U.S. goods are cheaper to Europeans. B) downward sloping, because higher dollar prices of euros mean that U.S. goods are cheaper to Europeans. C) upward sloping, because higher dollar prices of euros means that U.S. goods are cheaper to Europeans. D) upward sloping, because lower dollar prices of euros means that U.S. goods are cheaper to Europeans.