Answer:
The correct answer is D.
Step-by-step explanation:
The tone presented in "The Story of an Hour" is very tense for two reasons: One is Mrs. Mallard heart condition and the possibility that any bad news could cause her to have a heart attack. The second one is the confusing feelings Mrs. Mallard gets when she heards about her husband's passing.
The other tone that fills the story is the happiness that Mrs. Mallard feels when she realizes that, now that she is a widow, she is finally free to do as she pleases.