Which of the following refers to a group of countries committed to removing all barriers to the free flow of goods and services between each other but pursuing independent external trade policies?
(a) free trade area
(b) customs union
(c) common market
(d) economic union

(A) Free Trade Area

Explanation:

According to my research on trade between countries, I can say that based on the information provided within the question the term being described is called a Free Trade Area. Like mentioned in the question this is a region in which members passing through the region have signed a free trade agreement which allows for allows for cooperation between them which in term reduces trade barriers, import quotas and tariffs, and to increase trade of goods and services with each other.  

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answer; /// (b) i believe its that is paid to state and federal taxing authorities;