How did the improvements to railroads affect the economy and transportation in the u. s

Give an example of a situation in which an individual's pursuit of economic self-interest may not benefit but instead harm the rest of society

Why would nations in latin america be part of a mostly arab cartel group known as opec? a) latin america refused to do business with countries that were not part of opec. eliminate b) natural resources such as oil are a major economic development for some latin american countries. c) latin america has a long history of distrust of the united states and fears a take-over of oil fields. d) latin american nations such as venezuela needed in getting natural resources to other parts of the world. 15

Which states universal prekindergarten has been most effective in preparing children for school?