Final answer:
Sepa convinced Don Julio to return the necklace by expressing her desire to come back and showing gratitude for the ring he had given her. it can be inferred that she succeeded in doing so.
Step-by-step explanation:
Sepa convinced Don Julio to return the necklace to her by expressing her desire to come back and showing gratitude for the ring he had given her. She told him softly that she would be returning and asked if he was glad and had missed her. She also expressed her appreciation for the ring he had given her, which was a heavy dull gold band with an immense sapphire in an oval setting, an Italian workmanship.
It can be inferred that Sepa succeeded in convincing Don Julio to return the necklace because she showed him her desire to reunite and expressed gratitude towards him, which indicates her genuine intentions.