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 honesty and freedom b. their youth and energy c. their beauty and grace d. their ability to fly and swim