What is martin luther king, jr. doing stylistically with his diction to make this 4th paragraph effective?

moreover, i am cognizant of the interrelatedness of all communities and states. i cannot sit idly by in atlanta and not be concerned about what happens in birmingham. injustice anywhere is a threat to justice everywhere. we are caught in an inescapable network of mutuality, tied in a single garment of destiny. whatever affects one directly, affects all indirectly. never again can we afford to live with the narrow, provincial "outside agitator" idea. anyone who lives inside the united states can never be considered an outsider anywhere within its bounds.

a) he uses a series of alliterative words to convey emotion.

b) he uses contrasting words to show a juxtaposition of ideas.

c) he uses a caustic diction intended to polarize his audience.

d) he uses short, declarative sentences to convey factual information.