Excerpt from Abraham Lincoln’s “A House Divided” speech, June 17, 1858

In my opinion, it will not cease, until a crisis shall have been reached, and passed. "A house divided against itself cannot stand." I believe this government cannot endure, permanently half slave and half free. I do not expect the Union to be dissolved—I do not expect the house to fall—but I do expect it will cease to be divided. It will become all one thing or all the other. Either the opponents of slavery will arrest the further spread of it, and place it where the public mind shall rest in the belief that it is in the course of ultimate extinction; or its advocates will push it forward, till it shall become alike lawful in all the States, old as well as new—North as well as South. Have we no tendency to the latter condition? . . . The new year of 1854 found slavery excluded from more than half the States by State Constitutions, and from most of the national territory by congressional prohibition. Four days later, commenced the struggle, which ended in repealing that congressional prohibition. This opened all the national territory to slavery, and was the first point gained.

Use the excerpt to answer the question.

What issue does Lincoln identify as the root cause of worsening sectional tensions?

A.
states’ rights vs. federal power

B.
ethical questions about slavery

C.
laws permitting slavery and its expansion

D.
economic disparities between free and slave states

PLEASE, ALSO EXPLAIN WHY ITS THE CORRECT ANSWER, DO NOT GUESS, USE THE EXPERT.

C. Laws permitting slavery and its expansion. In the excerpt, Lincoln identifies the spread of slavery as the root cause of worsening sectional tensions. He states that the struggle to repeal the congressional prohibition of slavery in the national territory was the first point gained by its advocates, and that the issue will not cease until a crisis is reached and passed. He also states that either the opponents of slavery will arrest the further spread of it, or its advocates will push it forward until it is lawful in all the states.