The correct answer is B. It killed nearly 50% of the population
Explanation:
The Black Plague was one of the most important pandemics that affected multiple countries mainly in Europe during the 14th century and ended in the death of 75 to 200 million people. As other important cities in Europe, Florence was importantly affected by the plague, by then Florence was already a center of culture and due to this there were negative impacts on the development of art and other expressions of culture, additionally, in terms of population it is estimated the population of Florence went from 120000 inhabitants to 50000, which implied around 50% to 60% of the population was killed during this pandemic.
