Adopting a common currency can be helpful to European traders because this means that the value of that currency is the same in all the European countries. This is unlike if each country had a different currency. When country A's currency has a higher value than country B's, then traders from country A will benefit more than traders from country B if they were engaging in cross border trade.
Explanation:
Today, historians generally agree on several main causes of the Korean War, including: the spread of communism during the Cold War, American containment, and Japanese occupation of Korea during World War II. ... The American containment policy is often referred to as the Truman Doctrine, since American President Harry S.
The first one is the correct one