Which treaty amended the European Union treaty and broadened cooperation among member states?

• A. Treaty of Paris
• B. Treaty of Amsterdam
• C. Treaty of Brussels
• D. Treaty of Maastricht

Answer: (B)

The main idea is how a treaty can change how the European Union operates and expands cooperation among its members. The Treaty of Amsterdam fits this because it amended the Treaty on European Union (the Maastricht Treaty) and broadened cooperation in several key areas. It expanded the use of qualified majority voting in more policy areas, strengthened the role of the European Parliament, and extended cooperation in justice and home affairs (such as asylum and immigration) as well as in foreign policy. It also prepared the Union for future enlargement by adjusting decision-making rules and institutional arrangements. In short, it updates the EU’s framework to work more closely together, making it the best match for this description.