Answer :
Final answer:
M. Lantin asks about the necklace's value due to his disbelief in its true worth.
Explanation:
M. Lantin asks the first jeweler if he is sure about the value of his wife's necklace because:
- c. He had thought the necklace was artificial and can't believe it is worth so much.
When M. Lantin finds out the true value of the necklace, it comes as a shock to him as he had believed it to be of little worth. This reaction showcases his disbelief and astonishment at the actual value of the necklace.
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