Answer: b. She is seeing the positive side of her husband's death.
Explanation: In this passage from "The Story of an Hour" by Kate Chopin, the related issue that is being suggested by Mrs. Mallard's demeanor is that <u><em>she is seeing the positive side of her husband's death</em></u>. Mrs. Mallard has just been told that her husband is dead. She finds that she can see things from the positive side. She is free now.