Paragraf Test-13 Soru=5

According to the passage, letters posted in the Inca Empire ...... .

A superb system of roads linked all the parts of the
Inca Empire with the capital at Cuzco. A road along
the coast, .three to four metres wide, was marked
with stones or mud walls. The highland roads were
narrower but required greater engineering skill.
Workmen paved the roads with large flat stones and
built retaining walls on the steep hillsides. They
hung rope bridges across rivers and canyons and
built rest stations at regular intervals along the
roads. Because of their superior road system, the
Incas maintained an efficient postal service.
Runners stationed every few kilometres relayed the
messages, which sometimes travelled as much as
250 kilometres a day, making it possible to get a
letter from one end of the empire to another in just a
few days.