16. If in the year 1990 a country had positive NFA, and in 2010 its NFA were negative, it must be the case that: (a) the country had current account surpluses during the period 1990-2010 (b) the country had current account deficits during the period 1990-2010 (c) there were government budget deficits during the period 1990-2010 (d) there were government budget surpluses during the period 1990-2010 (e) both (a) and (c)