Although the law of diminishing returns is widely accepted in economics, it also ensures that the marginal revenue product must be positive

If the Japanese yen was 123 per dollar and now it is 114 yen per dollar, it can be said that

A) the yen has appreciated against the dollar. B) the yen has depreciated against the dollar. C) the dollar has appreciated against the yen. D) Both answers C and B are correct

Immigration tends to lower the income of all factors of production. True or false

Indicate whether the statement is true or false