Which concept is expressed in both speeches? A. Agreements between nations must be negotiated in secret to avoid conflict and confrontation.

B. No single nation can protect the freedom and security of people around the world.

C. It is in the United States interest to champion freedom and justice outside of its borders.

D. Those resisting aggression abroad are helping to keep the United States safe.​

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C

Explanation:

in "letter from a birmingham jail," king argues that there are four basic steps in any nonviolent campaign: "[c]ollection of the facts to determine whether injustices exist; negotiation; self purification; and direct action." finally, direct action is taken and acts such as boycotts and sit-ins are staged.