challenge: What is the geographical location of Cercado Province in terms of latitude?
  
  A. Between 20° 15' and 20° 51' south
  B. Between 23° 15' and 23° 51' south
  C. Between 21° 15' and 21° 51' south
  D. Between 22° 15' and 22° 51' south
  Answer: 