Answer:
The correct answer is D.
Step-by-step explanation:
The sentece from the short story "The Necklace" that causes surprise in the reader is the one that reveals that the borrowed necklace, which was supposed to be made of diamonds, was merely a replica.
This means that all of Mathilde's hard work to pay for the one she bought to replace the one she lost, was not necessary to begin with, since the original only costed five hundred francs.