Which bloc is defined by the free movement of factors of production, enterprise and services?

• A. Free-trade area
• B. Customs union
• C. Economic union
• D. Single market

Answer: (D)

The idea being tested is the broader integration that allows movement of people, capital, services, and other production factors across borders—the Single Market. This bloc is designed so firms can operate across member states without barriers: workers can move for jobs, capital can flow where it's needed, and services can be offered across borders with harmonized rules. That combination of free movement for labor and services (along with goods and capital) fits the description in the question, making the Single Market the best answer.

The other options focus on particular aspects: removing tariffs on goods among members (free-trade area) or applying a common external tariff (customs union) or pursuing deeper policy coordination (economic union). They don’t capture the full free movement of production factors and services across borders like the Single Market does.