During a certain​ year, aggregate disposable income of Country Q increased considerably. The level of inflation in the country was also relatively low by historical standards.​ Julia, an economist in this​ country, argued that this is an indication of higher purchasing power of its people. Which of the​ following, if​ true, would weaken​ Julia's argument? A. The average price level in country Q declined. B. The population in country Q increased. C. Net exports in country Q were positive during the year. D. The domestic currency appreciated during the year. E. The tax structure in the economy was proportional to income