The correct answer is A) laborers.
The role that people conquered by the Incas played in Incan society was of laborers.
The Inca civilization developed in Prehispanic times in the region of the Andean Mountains, in Peru. They were impressive architects that built the city of Machu Picchu at the top of the mountains. They also had a good army that served to defend their territory and conquer some others. When they conquered another tribe, the Incas used those people as laborers or workers in many activities in the daily life of the Incas.