Answer: C. Christian boys were drafted to be slaves for the sultan; they were trained and educated as soldiers and bureacrats.
Step-by-step explanation:
The devshirme system has existed since the earliest period of the rise of the Ottoman Empire. These Christian boys received a great education in every sense, and primarily in the military. That elite military formation was called the Janissaries, and they were under the sultan's direct control. Some people have made a lot of progress in their careers with the devshirme system. Thus, Mehmed Pasha Sokolović, who was taken from the Balkans to Constantinople by Devšir, became the Grand Vizier. This is the highest position in the empire after the Sultan.