PLEASE HELP QUICKLY: Read this passage from the poem "The Wild Swans at Coole." In this stanza, what does the speaker envy about the swans?

Unwearied still, lover by lover,
They paddle in the cold
Companionable streams or climb the air;
Their hearts have not grown old;
Passion or conquest, wander where they will,
Attend upon them still.

A. Their youth and energy

B. Their honesty and freedom

C. Their beauty and grace