Final answer:
Her sister Josephine and Richards, her husband's friend, are the two people who informed Louise Mallard about her husband's death. Therefore, the correct option is C.
Step-by-step explanation:
The two people who came to Louise Mallard to deliver the sad news of her husband's death were her sister, Josephine, and her husband's friend, Richards. Josephine broke the news to Louise with great care due to her heart condition, and Richards had confirmed the news of Brently Mallard's death with a second telegram after seeing his name listed in a newspaper report about a railroad disaster. This tragic news begins the roller coaster of emotions that Louise experiences in the story "The Story of an Hour" by Kate Chopin.