Which detail best supports the theme "what goes around, comes around"? a. the next day, as he was carefully cleaning the bird's cage, the walls again creaked and groaned, and the mirrors grew narrower as the windows widened. b. one day, as two white doves suddenly soared aloft in the blue sky, the poor little bird, who had now become the prince's comrade, gave a pitiful little trill. c. he spent so much time gazing into the wonderful mirrors that he had very little use for the books and games that had been placed there for him. d. his fairy godmother had told him that it was his house; therefore he was interested in looking at everything in it.