Madame Loisel is a woman who is not content with what she has. She is more concerned about appearance and lusting for things that are above her means. She knows her limitations but refuses to stay in it, rather preferring to go the extra mile for that which she thought could be hers.
Madame Forestier seeks the affluent life like Loisel, but she knows her limit and stays within it. She is a woman who cuts her coat to her size by making imitations of real jewellery she wanted but knew she could not get.
The correct answer is C: The rich have too much time on their hands and not enough to think about. Pope tries to punctuate the ridiculousness of a society in which values have lost all proportion and the society the poem describes is one that isn't able to distinguish between what really matters and what doesn't. His intention was to cool hot tempers and to encourage people to laugh at their own absurdity.