Which excerpt from the passage most effectively illustrates Kennedy’s point that all democratic nations stand in support of West Berlin?

A “. . . 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.”

B “. . . and to come here in the company of my fellow American, General Clay, who has been in this city during its great moments of crisis and will come again if ever needed.”

C "All free men, wherever they may live, are citizens of Berlin, and, therefore, as a free man, I take pride in the words 'Ich bin ein Berliner!'"

D "And there are even a few who say that it is true that communism is an evil system, but it permits us to make economic progress. Lass' sie nach Berlin kommen. Let them come to Berlin."