Which statement is true regarding the European Union (EU)?

The assertion that most members share a common currency is accurate. The euro is used by 19 of the 27 EU member states, forming the Eurozone. This reflects a significant level of economic integration among these countries, as they have chosen to adopt a single currency to facilitate trade, reduce currency exchange costs, and promote stability.

While not all EU countries are part of the Eurozone, the adoption of the euro by a majority of EU members leads to the statement being considered true. This situation highlights the ongoing efforts within the EU to harmonize economic policy, although there remain member states that have retained their national currencies. This illustrates the diversity within the EU in terms of economic integration and monetary policy, but the fact that a substantial portion uses the euro indicates a strong commonality in this regard.