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Historians generally recognize three motives for European exploration and colonization in the New World: God, gold, and glory. Motives for Exploration For early explorers, one of the main motives for exploration was the desire to find new trade routes to Asia. By the 1400s, merchants and crusaders had brought many goods to Europe from Africa, the Middle East, and Asia. Demand for these goods increased the desire for trade.
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I think in the 10millions
Im pretty sure its b. establish an international organization dedicated to peaceful resolutions of conflicts
The transcontinental railroad let the settlers go to the western side of America. With that they needed more farms for food and resources to provide a profit. The settlers did not want to do the work to they forced slaves to work for them. The settlers in the west made slavery increase due to the wanted of profit and the needing to survive.