2. all the following contributed to the regional tensions which ultimately prompted seven southern states to declare their independence from the united states, except:
a. lincoln’s campaign platform and inaugural address promising to abolish slavery
b. disputes over tariffs and lincoln’s campaign platform and inaugural address promise to impose another tariff
c. expanding federal authority even as the rural south felt it had limited authority and sway in federal elections and national politics.
d. the legal struggle over the status of the enslaved convinced many northern abolitionists that abolition would only come by empowering the enslaved to rise up and liberate themselves

C

Explanation: The difference between northerners and southerners originated in the development process of each of these regions. While the south prospered at the expense of slave labor and the exportation of raw materials to Europe, the north favored wage labor and the articulation of powerful trade.

These different orientations eventually strengthened a confrontation that first manifested itself in the nation's fiscal, agrarian, and labor policies. Northern interest was diametrically opposed to what Southern political representatives saw as necessary for the development of their economy. The union that once turned northerners and southerners into children of the same nation seemed to fail by a way that did not seem to offer a compromise.

interdependence is when all participating groups and individuals depend on each other. if you depend on one anothers goods, you end up trading in order to get the items you're looking for. (for ex: if i have food and you have water, we trade in order to depend on each other to live)

i think it is the first one hope this