challenge: Where is the main headquarters of the Ministry of Health of Panama located?
  
  A. Torrijos-Carter Building, in the district of Ancón in the capital of Panama
  B. Gorgas Hospital, in the district of Ancón in the capital of Panama, Panama City
  C. Gorgas Hospital, in the district of Ancón in the city of Colón
  D. Ministry of Health building, in the district of San Francisco in the city of Panama
  Answer: 