PLEASE HELP! Read the passage "European Trade" and answer any questions that follow.

European Trade
by Emma Humphries
Europe conducts a lot of trade. In fact, European trade accounts for one-fifth of the volume of international trade. The European Union (EU) was established in 1993 to promote and strengthen the economies of its member countries. It sought to achieve this goal by implementing the EU Single Market, which guarantees the free movement of goods, capital, services, and people between the EU's member states.

Which of these barriers to trade would NOT be implemented under the system described above?

A. quotas on non-member countries
B. sanctions on hostile countries
C. tariffs on member countries
D. embargoes on enemy countries