Northerners mostly agreed that: A. Demands for states' rights were dangerous to the Union.
B. Nullification was proper for certain laws.
C. Tariffs were unfair to their region.
D. The federal government had too much power.

Social darwinism refers to the the theory that people who succeed in our economic system will one day out compete those who fail. one day the rich will out succeed the poor so we'll that there will eventually be no more poor

Ithink it's b . narratives cannot be changed by other historians later

The answer will be a

“what were the main causes for the decline of the roman empire? ”