In the next several decades, the dependency ratio relevant to the Social Security system is expected to ________

Under the Exchange Rate Mechanism of the European Monetary System, when the British pound depreciated below its lower limit against the German mark, the Bank of England was required to buy ________ and sell ________,

thereby ________ international reserves. A) pounds; marks; losing B) pounds; marks; gaining C) marks; pounds; gaining D) marks; pounds; losing

In the Solow growth model, the growth rate of real GDP per worker depends on the ________, and in the AK growth model, the growth rate of real GDP per worker depends on the ________

A) rate of depreciation; rate of dilution B) investment growth; rate of population growth C) growth rate of the capital stock; growth rate of the labor force D) rate of labor-augmenting technological change; national saving rate