Final answer:
Mrs. Clara Post gave Rhoda a bird, which is concluded from the dialogue discussing a birdcage and the discovery of a dead bird.
Step-by-step explanation:
The character Mrs. Clara Post gave Rhoda a bird, as it is implicitly revealed through the dialogue between the characters in the play. The various references to the bird throughout the excerpts, such as the birdcage and Mrs. Peters and Mrs. Hale's discovery of the dead bird wrapped in silk, indicate that the gift Mrs. Post gave was indeed a bird. None of the other options provided, such as a necklace, medal, kitten, or book, correspond to the textual evidence given in the excerpts.