In the above figure, after the second worker is hired, the marginal product of labor is

A balance of payments surplus occurs if

A) the supply of a nation's currency is equal to the demand for the currency at the current exchange rate. B) exports exceed imports. C) the supply of a nation's currency exceeds the demand for the currency at the current exchange rate. D) the demand for a nation's currency exceeds the supply of the currency at the current exchange rate.

Consider the market for credit. When the demand for credit increases while the supply of credit remains unchanged,

A) the interest rate will decrease and the amount of credit provided in the market will increase. B) the interest rate will increase and the amount of credit provided in the market will increase. C) the interest rate will decrease and the amount of credit provided in the market will decrease. D) the interest rate will increase and the amount of credit provided in the market will decrease.