There were times when she was ill and could not leave her bed for months and even years. There were times when she worked day and night, visiting hospitals, making plans for the care of the poor and the sick, talking with important government officers, writing reports. Two great aims were ever before her: improving the conditions of the common soldiers in the army, and making nursing a well-paid, respected life-work for women. In both of these aims she had great success. Because of her, nursing is what it is today. The Nightingale Training School for Nurses was started near one of the large hospitals of England. The fine training that thousands of young women received here during the years that followed has greatly changed nursing all over the world. The little book on nursing which she wrote at this time is still interesting to read. It may contain little which is new to people today, but to the people of her day her ideas were most surprising. Thousands of copies were sent to mills, workshops, villages and schools, and it was translated into three European languages. The simple, direct advice on the care of sick people was much needed and most helpful. Whom is the passage talking about

A. Helen Keller.
B. Florence Nightingale.
C. Marie Curie.
D. George Washington.