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When a number of countries agree to remove all trade barr...

When a number of countries agree to remove all trade barriers among themselves and at the same time charge a common tariff against non member countries, it is known as

A.

Free trade area

B.

Common market

C.

Custom union

D.

Economic community

Correct answer is C

customs union is generally defined as a type of trade bloc which is composed of a free trade area with a common external tariff. Customs unions are established through trade pacts where the participant countries set up common external trade policy (in some cases they use different import quotas).