Answer:
Most likely D
Explanation:
A sudden drop in economy is big, and could potentially demolish, a particular region or country if out of context you are meaning a certain place.
Answer:
Newton discovered gravity. The discovery of gravity .. Newton argued that the main force in the universe, although it was very much clear to Newton that gravity basically affected all objects on Earth and including in space.
When a star burns through the last of its fuel, the object may collapse, or fall into itself. For smaller stars (those up to about three times the sun's mass), the new core will become a neutron star or a white dwarf. But when a larger star collapses, it continues to compress and creates a stellar black hole.
Blacks supported the republican party because the Republican party supported them and were anti-slavery. Republicans (especially the radical ones) wanted to punish the Confederate states for supporting slavery and breaking away from the U.S. Republicans helped blacks with segregation and discrimination.