Countries A, B and C are located within the same region. They have noticed that other countries are negotiating and forming new trade agreements. Among themselves (Countries A, B and C), the three countries have agreed to significantly reduce or abolish tariffs altogether among them, while each member country (A, B and C) keeps its own tariffs in regard to third countries. What level of economic integration did they form? Question 35 options: 1)Common market. 2)Customs union. 3)Free trade area. 4)Preferential tariff