Josephine tells Louise about her husband's death calmly to avoid worsening Louise's weak heart condition.
- The reason why Josephine tells Louise about her husband's death as calmly as possible is because Louise has a weak heart, and Josephine doesn't want to worsen her condition.
- This careful approach is described in 'The Story of an Hour' by Kate Chopin, where it is stated, 'Knowing that Mrs. Mallard was afflicted with a heart trouble, great care was taken to break to her as gently as possible the news of her husband's death.'
- Therefore, the correct answer is c. Josephine doesn't want to worsen Louise's weak heart.