"We are not one people. We are two peoples. We are a people for Freedom and a people for Slavery. Between the two, conflict is inevitable." — Frederick Douglass, The North Star, 1855

Douglass's characterization of sectional conflict in the passage most directly supports which of the following causes of the Civil War?

• A The expansion of railroads created irreconcilable economic priorities between North and South.
• B Fundamental disagreement over slavery produced two societies whose values could not be reconciled.
• C Federal tariffs disproportionately benefited Northern industry at the expense of Southern agriculture.
• D The failure of the Compromise of 1850 unilaterally destroyed Southern political power in Congress.