In the story the ruby necklace paragraph 7 contributes to the development of the plot because it shows

Women are greedy and consider expensive jewelry as a source of her happiness.

Explanation:

The necklaces is a sort story whose plot revolves around the couple who lives in the France. The husband is not rich but loves her wife and works as a clerk for Minister of Education. The wife is beautiful and find her self attracted to glamorous and expensive jewelry. She considers expensive earnings, necklaces and other accessories as a source of her happiness.

did you ever get an answer? i'm on the same question : (

the answer is c. loyalty can be instilled by regularly reminding people why their leader is great.

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