How could an observer distinguish the home of a rich Inca from a regular citizen?

a homes of the wealthy were made with wood
b homes of the wealthy had no trapezoid shapes
c homes of the wealthy had stone roofs
d homes of the wealthy had no mortar

c) homes of the wealthy had stone roofs

The best way an observer could distinguish the home of a rich Inca from a regular citizen is by looking at the roofs of the homes. Wealthy Incas had homes with stone roofs, which were a sign of their high social status and wealth. On the other hand, regular citizens had homes with roofs made from other materials such as thatch or wood, which were less expensive and readily available.