Final answer:
Both Mr. and Mrs. Loisel are at fault for their misfortune due to their lack of communication and their excessive desire for material wealth. Option c is the best answer.
Step-by-step explanation:
The fault for the Loisels' misfortune can be attributed to both Mr. and Mrs. Loisel [option c is the best answer]. Mr. Loisel is partially at fault for not fully understanding his wife's desire for material wealth and not being attentive to her needs. Mrs. Loisel is also at fault for her excessive desire for wealth and her constant dissatisfaction with her current lifestyle.
For example, when Mrs. Loisel is given the opportunity to attend a high-class event, she insists on borrowing an expensive necklace, which ultimately leads to their misfortune. Additionally, Mrs. Loisel's dissatisfaction with her social status prevents her from appreciating the things she already has. In conclusion, both Mr. and Mrs. Loisel contribute to their misfortune due to their lack of communication and their pursuit of material wealth at the expense of their happiness and contentment.