What is the effect of the words "the living joy that sang one spring morning, sending its glad voice across an hundred years”?

The phrase gives joy a voice that can sing and carry across a century, treating an abstract feeling as if it were alive. This personification suggests that the happiness experienced in the past can endure and still be felt long afterward. Choice A best captures that effect; the words do not claim that nothing changes or that happiness is found only in other people.

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