The correct answer is B) The United States is prepared to protect freedom.
Kennedy's inaugural address clearly shows that his policies will revolve around protecting independent and free countries all over the world from tyranny. This is evident from multiple parts of the speech including:
1) "Now the trumpet summons us again....a call to bear the burdgen of a long twilight struggle....a struggle agains the common enemies of man: tyranny, poverty, disease..." - This portion of the excerpt shows that Kennedy feels it is America's job to help countries fight against the aforementioned issues.
2) "...Only a few generations have been granted the role of defending freedom in its hour of maximum danger. I do not shrink from this responsibility- I welcome it." This shows that Kennedy is completed dedicated to the idea that America will play a pivotal role in helping to keep the idea of freedom alive all over the world.