The role of the president has evolved over time becausea. the needs of the nation have changed. b. the role of the executive branch has changed. c. the role of congress has changed. d. the needs of the chief of staff have changed.

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