challenge: Where is the highest point of Senegal located in relation to Nepen Diakha?
  
  A. 5 km east of Nepen Diakha on the Guinean border
  B. 10 km west of Nepen Diakha in the Kédougou Region
  C. 2.7 km northwest of Nepen Diakha on Baunez ridge
  D. 2.7 km southeast of Nepen Diakha on Baunez ridge
  Answer: 