What is one major benefit countries get from joining intergovernmental organizations (igos)?
a. wealthy countries can avoid providing aid to poor countries by joining an igo. b. groups of countries can wield more economic influence than individual countries.
c. igos allow member countries to resolve their own disputes without consulting the group.
d. countries that join igos have more political independence than nonmembers.

B. A group of countries working together is bigger and more powerful than one country acting by itself. A is wrong because membership in an IGO puts more pressure on a wealthy country to aid poor countries. C is wrong because member countries are supposed to consult the group. D is wrong because by joining an IGO a country agrees to abide by the group's decisions to a certain extent.

U.S. had more railroads, more people, more industry, and increasingly effetive naval blockades