Read the excerpt. The voice I hear this passing night was heard
In ancient days by emperor and clown:
Perhaps the selfsame song that found a path
Through the sad heart of Ruth, when, sick for home,
She stood in tears amid the alien corn;

What is the main idea of these lines from Verse II of “Ode to a Nightingale” by John Keats?

A) Ruth is crying because she cannot hear the bird’s song.

B) The bird’s song has been heard throughout the ages.

C) The bird’s song is like mortals; it will die.

D) The voice the speaker is hearing is not actually the bird singing but his own thoughts.