Which sentence from the speech BEST supports Kennedy's assertion that the United States must win the race for Space?
A. No nation which expects to be the leader of other nations can expect to stay behind in this race for space
B. Yet the vows of this Nation can only be fulfilled if we in this Nation are first, and therefore, we intend to be first
C. Those who came before us made certain that this country rode the first waves of the industrial revolutions, the first waves of modern invention, and the first wave of nuclear power.
D. In short, our leadership in science and in industry, our hopes for peace and security, our obligations to ourselves as well as others, all require us to make this effort to solve these mysteries, to solve them for the good of all men, and to become the world's leading space-faring nation