Which passage from kennedy’s inaugural address is an example of a metaphor?

a. “to those people in the huts and villages of half the globe struggling to break the bonds of mass misery . .”

b. “[t]hose who foolishly sought power by riding the back of the tiger ended up inside.”

c. “all this will not be finished in the first one hundred days. nor will it be finished in the first one thousand days, nor in the life of this administration . . ”

d. “finally, whether you are citizens of america or citizens of the world, ask of us here the same high standards of strength and sacrifice which we ask of you.”