As of 2019, 19 countries in Europe had adopted the euro as their common currency. These countries are called the euro zone. According to an article in the Wall Street Journal, “The European Union’s statistics agency said the combined GDP of the eurozone’s 19 members increased by an annualized 1.5% in the three months through March.” Is it likely that the article is referring to the growth in nominal GDP or the growth in real GDP? Briefly explain.