I would say either problem/solution or cause/effect
Answer: They are both very successful fencers who competed in the Olympics
Explanation:
It’s B, the components are topic sentence, evidence, and explaining the evidence
The option that most effectively completes the sentence is “allowing world nations freedom of choice, within reason, promotes peace”. According to John Kennedy in his speech delivered at the American University, nations (in this case he refers to the Soviet Union) should not try to impose rules on other nations as this interferes with the process of peace and creates tension.