Which excerpt from the text most effectively establishes the connection that Kennedy wants to make between democracy as a system of peace and communism as a system of conflict?

"In 18 years of peace and good faith, this generation of Germans has earned the right to be free, including the right to unite their families and their nation in lasting peace, with good will to all people."

"Freedom is indivisible, and when one man is enslaved, all are not free. When all are free, then we can look forward to that day when this city will be joined as one and this country and this great Continent of Europe in a peaceful and hopeful globe."

"There are many people in the world who really don't understand, or say they don't, what is the great issue between the free world and the Communist world."

"I want to say, on behalf of my countrymen, who live many miles away on the other side of the Atlantic, who are far distant from you, that they take the greatest pride that they have been able to share with you, even from a distance, the story of the last 18 years."