Which sentence from the speech BEST supports Kennedy's assertion that winning the race for space is essential to peacekeeping?
A)No nation which expects to be the leader of other nations can expect to stay behind in this race for space.
B) We have vowed that we shall not see it governed by a hostile flag of
conquest, but by a banner of freedom and peace.
C) We have vowed that we shall not see space filled with weapons of
mass destruction, but with instruments of knowledge and
understanding,