Answer:
This expansion led to debates about the fate of slavery in the West, increasing tensions between the North and South that ultimately led to the collapse of American democracy and a brutal civil war. This revolutionized America's economy. This idea that it was their destiny to expand caused Americans to disregard the territorial rights of Native Americans, wiping out many tribes and causing a cultural divide, tension and wars. The negative effect that this had on Native Americans were lasting effects.
Explanation:
Prince Henry of Portugal, or Henry the Navigator, sponsored two expeditions which were Bartolomeu Dia's trip around the Cape of Good Hope and Gil Eannes's trip around Cape Bojador
True, because based on scientific studies, it has been proven that a reward-based approach, rather than punishment, is more likely effective in adolescent learning :)