Question

Which sentence below BEST explains the effect of this metaphor?

But a bird that stalks
down his narrow cage
can seldom see through
his bars of rage

A.
The metaphor explains that the bird that is trapped may break the bars that confine it.
B.
The metaphor explains that the bird that is trapped may not hope to see the outside world.
C.
The metaphor explains that the bird that is trapped may soon grow to accept the situation.
D.
The metaphor explains that the bird that is trapped may be consumed by its own anger.