Answer: Devshirma and slavery have both similarities and differences.
Explanation:
The Ottomans practiced Devshirma as a forcible abduction of Christian boys into the elite Ottoman army ranks. These boys were taken from their families and were enlisted in the elite Ottoman military ranks. Slavery, in itself, is a violent process of alienating people for forced labor. If we look at these definitions, they are similar in themselves. A slave could get his freedom in certain situations, but he always remained a slave during the service.
On the other hand, officials in the Ottoman Empire who found themselves in the state under the means of devshirme could advance in the service. There were many examples when people who became residents of the Ottoman Empire came to the country's highest positions. The Grand Ottoman Vizier Mehmed Pasha Sokolović had just arrived in the Ottoman capital, Constantinople, with a devshirme. He advanced so much in the service that after the sultan, he was the second man of the bulky Ottoman Empire. The very title of Grand Vizier in the empire implied that position.
There were several times during the Cold War when Americans thought there was a possibility of it going "hot", such as the Cuban Missile Crisis, and mistakenly thinking the other side had fired a nuclear weapon.
The correct answer should be the train. Railroads were built and these helped people transfer goods and heavy things like machines all over the country. Railroads were key for everything in the 19th century.
B. People compete for social stations based on their natural talents.
Please correct me I'm wrong!! :)