The bazaars that are seen in cairo are
a. makeshift shelters
b. elementary schools
c. traditional open-air markets
d. modern department stores

Option: C. traditional open-air markets

Explanation:

The bazaars in Cairo rare traditionally open-air market where people can see goods the sellers have to sell. Khan El Khalili is a very famous open-air market in Egypt and is one of the oldest. Open-air markets are called a souq and are common in Egypt and the Middle East. The bazaar is one of Cairo's main attractions for Egyptians as well as for tourists.

an angle + its complement = 90 degrees