Read this sentence from the passage:

Now the trumpet summons us again—not as a call to bear arms, though arms we need; not as a call to battle, though embattled we are—but a call to bear the burden of a long twilight struggle, year in and year out, "rejoicing in hope, patient in tribulation"—a struggle against the common enemies of man: tyranny, poverty, disease, and war itself.

What effect does Kennedy intend for this reference to battle to have on the readers?

A)To ask them to join in the struggle against enemy nations

B) To encourage them to support those serving in the military

C) To inspire them to work together toward a common good

D)To warn them that war with aggressive nations is about to happen