【单选题】

Florence Nightingale was a woman ahead of time.Before the nineteenth century, the profession of nursing was largely untraineD、Midwives were the only practitioners who had any training at all. For the most part, sick people were looked after by the women of the house in their own homes.

Florence Nightingale began a school in London,England to set the standards for nursing. She was able to do this because she had already established a reputation for her work with soldiers during theCrimean War. She carried a lamp above her head as she walked among the wounded men, thereby earning the nickname "the lady with the lamp. " It was this great lady who lit the way for nursing to become the respected profession it is today.
The passage is mainly about ______.
A、the impact of nursing on the soldiers of theCrimean War
B、Florence Nightingale and her influence on the profession of nursing
C、the difference between nurses and midwives
D、How Florence Nightingale earned the nickname "the lady with the lamp\