Answer: 5: A. Repetition
6: B. He is trying to rally colonists to fight for their freedom from Britain.
Explanation: 5: In the third paragraph of King's speech, "I have a dream," several rhetorical devices were used, such as metaphor, hyperbole, anaphora, etc. The most noticeable is the anthora or repetition of certain phrases or words at the beginning of each or almost every sentence of the paragraph.
6: Thomas Paine's pamphlet known as "Common Sense" whose purpose was to advocate independence from Britain, and addressed to colonists. Presenting arguments based on morality and a sound logic, Paine wanted to encourage colonists at the very beginning of the American Revolution.