Final answer:
Clara Barton is the correct answer. She wrote letters during World War I describing the hardships of caring for wounded soldiers.
Step-by-step explanation:
The correct answer is B. Clara Barton. Clara Barton is a famous nurse known for her work during the American Civil War and World War I. She founded the American Red Cross and played a significant role in providing medical care to wounded soldiers. During World War I, Barton wrote letters to her family that detailed the hardships and heartaches she encountered while caring for the wounded soldiers on the front lines.
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