A survey of businesspeople from Argentina, Brazil, Chile, Columbia, and Venezuela found that the market, on average, was more important for their economic well-being than any other market.

United state (U.S.)  

Explanation:

 According to the given question, the business people from the different types of countries that is from Chile, Argentina, Brazil and Columbia are basically found that the united states market is one of the important market for their economy on the basis of the survey report.

The united states is one of the largest economic country across the worldwide and it plays a very important role in the international economical and the political stage. In the united states, there is large number of production business and the large number of trading business.

  Therefore, United states is the correct answer.

answer(b) revenue account which increases;