Final answer:
President Lincoln's second inaugural speech addressed a war-torn nation and called for unity and understanding.
Step-by-step explanation:
The clause that correctly completes the sentence is:
- called for unity and understanding.
In President Lincoln's second inaugural speech, he addressed a war-torn nation and called for unity and understanding. This speech was given during the American Civil War, and Lincoln emphasized the need for reconciliation and compassion.
By choosing the clause 'called for unity and understanding,' the sentence becomes a complete thought and accurately describes the content of Lincoln's speech.
Learn more about Lincoln's second inaugural speech