Answer:
Explanaafter the Spanish conquest of the Moorish kingdom of Granada in January 1492, the Spanish monarchs, flush with victory, agreed to support his voyage. On August 3, 1492, Columbus set sail from Palos, Spain, with three small ships, the Santa Maria, the Pinta and the Nina.
The following innovations and equipment have been a critical part to our exploration in Space or Space exploration on searching life on Mars. Such objects which are mostly unmanned gives us the information that the man can't reach in these generation and play a big part of charting the uncharted regions of the universe especially in Mars and becoming a tool to understand the world outside of our planet.
Seems the answer would be D.
By being in the north and wanting the south to rid of slaves, and to make them join the north. but the south only had huge amounts of farm land, and no way to sow, till, or harvest all that land with out a few hundred slave workers. the north seen that as unnescessary to do. the north also laid out laws that the south didnt agree with leading to the southern states declaring independancy against the north witch lead to war.